Composition : Plywood All birch B/BB standard NF en 314-2. Rings in natural beech and/or untreated steel.
Use : This material is presented to children after rattles. It is important for the development of hand work. Intelligence develops through the "hand-brain-hand" loop: by manipulating objects, the hand perceives information it sends to the brain. This one assimilates them and the hand then uses this new data.
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