24 Interlocking Montessori Thick Foam Play Mats | Jigsaw Mats for Baby Playpens and Playrooms | Grey, Pink & WhiteThese 31. 5cm square thick foam mats are interlocking and modular so you can make different configurations. Ideal for playrooms, bedrooms or playpens, these play mats are durable, easy to clean and provide a comfortable base for baby. Soft and warm for Children to play and eat on the mat while protecting the flooring or carpets from scratches and stains. This mat is ideal for play areas, exercise rooms, daycares, schools or personal gym at home.