Most foam blocks slide across a wooden floor at exactly the wrong moment. These five use anti-slip fabric underneath and textured 200 g 21-wale corduroy on top, so a trapezoid, rectangle, cylinder, arch and wave stair stay where a toddler puts them. The neutral brown, beige and green tones mean the set can live in a shared family room rather than being hidden between visits, and 28D foam filling keeps every landing soft. Covers unzip for washing, the blocks support up to 99 lbs, and no assembly is needed. Approved for 18 months and up, and suited to children 3 to 6 under 47.2 in tall.