Keep playtime safe, happy, and comfortable with the BalanceFrom 9 Color Thick Interlocking Letter Puzzle Foam Exercise Play Mats.Make playtime safer with 36-square feet of comfortable and colorful floor coverage. Coming in 9 colors with alphabet letter cutouts, these interlocking play mats feature a non-slip design to stay in 1 place on the floor. Mats measure 0.4-inches thick to comfortably cushion your spine, hips, knees, and elbows to protect against rambunctious energy or accidental falls. Each mat gives 1-square foot of coverage and interlocks in whatever puzzle pattern you need to secure your floor space. Included edges help define a single border or open room to make several to suit your floor plan and play space. Moisture-blocking technology paired with high-quality Eva foam simplifies cleanup of accidental (or intentional!) spills. The foam tested free of lead, Bta's, and phthalates while meeting or exceeding Us toy safety standards.