PROTECTIVE FLOORING – Durable, high density foam provides a gentle surface and protection for your child in areas with hard floors EASY ASSEMBLY – Interlocking individual puzzle pieces are quick & simple to assemble, easy to pull apart for storage and painless to clean 16 SQ. FEET – 16 interlocking 12 x 12-in puzzle pieces with 24 border pieces, covers a 4 x 4-ft area when combined; or just use a few tiles to cover a small area VISUAL STIMULATION - Bright primary colors help to stimulate your baby's brain growth and early childhood development SAFE – Soft, textured EVA foam is free of toxic phthalates and creates a soft, comfortable play area for children of various ages