Avenlur: Extra 5% off eligible items • Bijou Build: 10% off select playsets. Discounts applied in cart!
Avenlur: Extra 5% off eligible items • Bijou Build: 10% off select playsets. Discounts applied in cart!
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Block Cart and Building Block Set - WB4375 – block cart and building blocks in a classroom

Block Cart and Building Block Set - WB4375

$499.00
Questions? Call or Text

sales@extremekidsworld.com

(888) 474-2326

by Whitney Brothers®

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Free Shipping in the Continental US
No Sales Tax Charged to any US State except AZ
Call us if you find a better price somewhere else

Block Cart and Building Block Set for Your Learning Space

Keep the joy of building without hunting for a place to store every block afterward. The Whitney Brothers Block Cart and Building Block Set WB4375 pairs a 75-piece beginner set with a rolling cart, giving kids room to imagine and your classroom a clear home for cleanup.

Block Cart and Building Block Set Features

  • Seventy-five wood blocks in 16 shapes offer plenty of combinations for towers, roads and pretend buildings.
  • The cart keeps the set together instead of spread among unrelated bins.
  • Four heavy-duty casters help adults move the blocks to an activity area.
  • The cart uses 15 mm birch plywood; the blocks have a natural finish and rounded edges.

What’s Included with the Block Cart and Building Block Set

One WB4374 block storage cart and one WB0368 beginner block set containing 75 blocks in 16 shapes.

Other toys, furniture and additional blocks shown in room settings are not included.

Block Cart and Building Block Set Specifications

  • Model: WB4375.
  • Recommended age: 24 to 72 months.
  • Overall dimensions: 23.75 inches W × 11 inches D × 14.5 inches H.
  • Product weight: 54 pounds.
  • Materials: 15 mm birch plywood cart and wood blocks.
  • Cart made in the USA; blocks imported.
  • GREENGUARD Gold certified.
  • Assembly and packaging: Ships fully assembled; 2 cartons.
  • Delivery method: Ground delivery.

Planning and Caring for Your Block Cart and Building Block Set

Use indoors with adult supervision. Move the cart with care and keep play routes clear. The cart is for block storage, not riding or climbing.

For routine furniture care, wipe with a soft cloth dampened with mild dish detergent and water, then dry immediately. Avoid abrasive cleaners and prolonged moisture. Read the furniture care guide (PDF).

The cart carries Whitney Brothers’ lifetime limited indoor furniture warranty for intended use in indoor educational or institutional settings. Exclusions and component-specific coverage apply. Review the indoor warranty on page 1 (PDF).

Planning the rest of your space? Explore our blocks and building play.

Give building time an organized beginning and ending. Add the WB4375 Block Cart and Building Block Set to your classroom.

Block Cart and Building Block Set - WB4375 Reviews

Description

Block Cart and Building Block Set for Your Learning Space

Keep the joy of building without hunting for a place to store every block afterward. The Whitney Brothers Block Cart and Building Block Set WB4375 pairs a 75-piece beginner set with a rolling cart, giving kids room to imagine and your classroom a clear home for cleanup.

Block Cart and Building Block Set Features

  • Seventy-five wood blocks in 16 shapes offer plenty of combinations for towers, roads and pretend buildings.
  • The cart keeps the set together instead of spread among unrelated bins.
  • Four heavy-duty casters help adults move the blocks to an activity area.
  • The cart uses 15 mm birch plywood; the blocks have a natural finish and rounded edges.

What’s Included with the Block Cart and Building Block Set

One WB4374 block storage cart and one WB0368 beginner block set containing 75 blocks in 16 shapes.

Other toys, furniture and additional blocks shown in room settings are not included.

Block Cart and Building Block Set Specifications

  • Model: WB4375.
  • Recommended age: 24 to 72 months.
  • Overall dimensions: 23.75 inches W × 11 inches D × 14.5 inches H.
  • Product weight: 54 pounds.
  • Materials: 15 mm birch plywood cart and wood blocks.
  • Cart made in the USA; blocks imported.
  • GREENGUARD Gold certified.
  • Assembly and packaging: Ships fully assembled; 2 cartons.
  • Delivery method: Ground delivery.

Planning and Caring for Your Block Cart and Building Block Set

Use indoors with adult supervision. Move the cart with care and keep play routes clear. The cart is for block storage, not riding or climbing.

For routine furniture care, wipe with a soft cloth dampened with mild dish detergent and water, then dry immediately. Avoid abrasive cleaners and prolonged moisture. Read the furniture care guide (PDF).

The cart carries Whitney Brothers’ lifetime limited indoor furniture warranty for intended use in indoor educational or institutional settings. Exclusions and component-specific coverage apply. Review the indoor warranty on page 1 (PDF).

Planning the rest of your space? Explore our blocks and building play.

Give building time an organized beginning and ending. Add the WB4375 Block Cart and Building Block Set to your classroom.

Why Buy From Us

Why Buy From Us

We know you have a lot of options when it comes to buying play equipment online.
What makes Extreme Kids World different isn’t just what we sell — it’s how we help you choose.

We Specialize in Play That Actually Works

Extreme Kids World specializes in outdoor playsets, trampolines, indoor play equipment, and sensory room equipment for high-energy and sensory-seeking kids.

We help families, grandparents, schools, and therapists choose play equipment that:

  • Encourages real movement (not more screen time)

  • Supports sensory regulation, focus, and confidence

  • Fits their space, lifestyle, and child’s needs

Play should make life easier and more joyful — not more overwhelming. We’re here to help make that happen.

We’re Curators, Not a Big-Box Store

We don’t try to carry everything.
We intentionally curate products that meet our standards for safety, durability, and real-world use.

Every item we sell is chosen because it:

  • Solves a specific problem (energy burn, regulation, limited space)

  • Works for a clearly defined age range or use case

  • Holds up to daily play — not just the first few weeks

That means fewer confusing choices and recommendations you can trust.

How We Help Families Choose the Right Equipment

Families come to Extreme Kids World because we help them think through the details that actually matter, including:

  • Yard size or indoor space constraints

  • Child age, ability, and energy level

  • Sensory needs and regulation goals

  • Indoor vs outdoor play priorities

Instead of guessing or buying something that doesn’t work, you get guidance from a team that works with play equipment every day.

Authorized Brands We Trust & Recommend

Extreme Kids World is an manufacturer authorized retailer for a carefully selected group of manufacturers we trust and recommend. Each brand we carry aligns with our focus on movement, regulation, safety, and long-term value.

Our current brand partners include:

ActivPlay
Acon
Avenlur
BenchK
2MamaBees
Bijou Build
BrainRich
EverBlock
Enabling Devices
Experia
Fabrication Enterprises
GermBlock
Goodevas
Gorilla Playsets
Kidodido
KidWise
PlayMor
PlayStar Wooden Playsets
Skywalker Trampolines
SportsPlay
Swing Kingdom
TFH Special Needs Toys
United Fiber Optic Lighting
Wesco NA
Whitney Brothers
Wood & Hearts

Being an authorized retailer means:

  • Genuine products (no gray-market items)

  • Manufacturer warranties are fully honored

  • Proper support if you need help after purchase

We don’t add brands just to expand our catalog — each one earns its place because it solves a real play, movement, or sensory need.

Straightforward Shipping & Support

Buying play equipment should feel clear and stress-free.

  • Free shipping within the continental U.S. (unless otherwise noted)

  • 30-day easy returns

  • Responsive, knowledgeable customer service

  • Satisfaction guaranteed — if something arrives damaged or incorrect, we make it right

We’re a real business with real people behind every order.

Who We’re Best For

Extreme Kids World is a great fit if you’re:

  • Raising a high-energy or sensory-seeking child

  • Trying to reduce screen time through meaningful movement

  • Working with limited indoor or outdoor space

  • Buying for a school, daycare, or therapy environment

Who We May Not Be Right For

  • Shoppers looking for the cheapest option available

  • One-click, no-guidance purchases

If you value thoughtful recommendations and long-term value, you’re in the right place.

How This Connects to Who We Are

Everything on this page reflects who Extreme Kids World is and how we approach play.

If you’d like to learn more about:

  • Why we focus on high-energy and sensory-seeking kids

  • How our founder’s real-life parenting experience shapes our recommendations

  • The values that guide how we choose products

👉 Visit our About Us page to learn more about our story, mission, and approach to helping families choose play equipment that truly works.

Our Promise

We believe play should:

  • Help kids move their bodies

  • Support emotional regulation

  • Build confidence and independence

  • Make home and learning environments calmer — not more chaotic

That’s why families trust Extreme Kids World — and why we stand behind every recommendation we make.

General Shipping Info

Shipping is free within the continental United States unless noted on the product page. 

Oversize and Heavy Items:

Oversize and freight shipping surcharges may apply to some items due to their size and weight regardless. The surcharge will be noted on the product page.

Freight shipped items are typically shipped within 5-7 business days but may take longer.  The freight company will call you to schedule your delivery.

The oversized item will be delivered to your driveway only. If receiving a large item, please have at least 2 people to unload item from the freight truck.

Freight trucks can only travel as far as the driver deems it safe (i.e. driving a 14-wheeler up a narrow twisted driveway)

For more details on shipping, visit our shipping page or, as always, feel free to give us a call at 888-474-2326—we're here to help!