Indoor air comfort logo
Indoor air comfort logo
Indoor Air Comfort GOLD certified

This product is certified to meet the most stringent standard for indoor air quality in Europe. Learn more.

Eurofins Indoor Air Comfort (Gold) certification is your best assurance that our product fulfills low product emissions requirements. It is also a sign of our focus on quality and contribution to a healthy indoor environment.

FSC logo
FSC logo
FSC® certified

The FSC label means that materials used for the product have been responsibly sourced. Learn more.

School set Hollow blocks

Item number: B652

excl. VAT
15-year warranty • Free shipping

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Product support
Our largest set of Hollow blocks will give young builders plenty of options. These blocks offer indoor opportunity for cooperative, gross motor play supporting all areas of learning. As children interact, they learn to communicate and solve problems.

Precision Cut

Cut accurately to the hundredth of an inch.

Solid wood

We use birch and beech, not only for their beauty and strength, but because these trees grow abundantly in our neighbouring European woodlands.

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0800 387 457

Product information

Recommended ages

3–8+ years

Product dimensions






  • 88 blocks in 6 shapes
  • Includes 28 squares, 16 double squares, 16 half squares, 4 ramps, 8 short boards, 16 long boards
  • Fits in two A45 Hollow block trolleys
  • Shares modular dimensions with Hollow blocks, Unit blocks and Mini unit blocks
  • Smooth, rounded corners and edges
  • Wood is coated with a clear, child-safe finish
  • For indoor use
ITERS and ECERS books

ITERS - 16: 7.3, 5.3

ECERS - 8: 7.2, 5.1; 22: 7.1, 7.3



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