Materials & safety
What the blocks are made of, what they are tested to, and which sets suit which age.
Materials
Hardwood ranges
Solid rubberwood (Hevea brasiliensis), a dense, close-grained hardwood harvested from plantation trees at the end of their latex-producing life. Kiln-dried to stabilise moisture content, machined, then sanded progressively to a 220 grit finish so there are no raised edges or splinter risks.
Colour comes from a water-based, non-toxic stain, not a surface paint — it soaks into the grain rather than sitting on top, so it does not chip off in flakes.
Foam ranges
High-density closed-cell EVA foam with a sealed wipe-clean skin. Free of BPA, phthalates, PVC, latex and formaldehyde. Dense enough to stack without deforming, light enough that being hit with one does not hurt.
Testing & standards
All products are tested to ASTM F963, the US consumer safety specification for toy safety, covering mechanical and physical properties, flammability, and heavy-element content in surface coatings. Our finishes are also tested against the CPSIA lead and phthalate limits.
Age suitability
| Range | Suitable from | Why |
|---|---|---|
| Foam & Soft | 6 months+ | No piece small enough to be a choking hazard; soft edges. |
| Starter Sets | 12 months+ | Oversized pieces sized for a whole-hand grip. |
| Wooden Blocks | 3 years+ | Includes smaller counting cubes. |
| Big Builds | 3 years+ | Large pieces; supervision advised for tall structures. |
| Bundles | 3 years+ | Contain small pieces from across the range. |
Age guidance is printed on every box, not just on the website. Where a set contains any piece that fits inside a small-parts cylinder, it is marked 3+ regardless of how the rest of the set would rate.
Care
- Hardwood: wipe with a damp cloth and dry. Do not soak or put in a dishwasher.
- Foam: wipe with mild soap and water; the sealed skin will not absorb it.
- Both: store dry. Wood left damp will eventually swell, which is what makes pieces stop sitting level.
Supervision. Blocks stack, and stacks fall. Please supervise young children with tall structures, and keep the smaller counting cubes away from children under three — including younger siblings of the child the set was bought for, which is the way it usually happens.