Soft foam Wood-Like building blocks are perfect for the young creative builder as they are soft and safe. Made of super high density lightweight foam with precise edges for easy building and stacking, this blocks set is ideal for block play on the floor or in the bathtub as the blocks float and stick easily to bathtub tile walls when wet. These unique blocks in different shapes and sizes are flexible making them a great tool in creative and imaginative play. Safe and Environmentally friendly. For Children age 12 month and older. Foam Blocks for soft and safe building fun! Toppling structures will not hurt young children and they wont wake your downstairs neighbors! Winner of the National Parenting Center Seal of Approval.