6 months & up. Fill the inflatable edge mat with tap water and the 5 water pals go swimming. Great for tummy time activities, babies will love pushing, patting and grabbing for tactile and visual fun all without getting wet. Tummy Time helps strengthen neck, leg and arm muscles. Improves motor skills, develops hand-eye coordination and promotes crawling. Measures 21"L x 17"W x 2"H.