This activity mat is the perfect way to track baby's growth by week or month. This lightweight playmat is perfect for tummy time with its large discovery mirror and a cushioned bolster to provide safe and steady support. The cushioned bolster encourages tummy time play, helping to strengthen baby's neck, back, and trunk muscles. From birth, baby's love to focus on the human face, which is encouraged with the mirror. Plus, it includes a separate teether/rattle ring for play anywhere, anytime. Mat is machine washable.