From the Manufacturer

Evenflo's Johnny Jump Up is the perfect answer to portable learn and playtime fun! This JJU helps baby achieve 3 important developmental milestones: gross motor skills, cause and effect and balance and coordination. The bright, colorful frog print seat pad removes easy and is machine washable providing for convenient cleaning opportunities. A sturdy door frame clamp provides secure fit to interior doorways at least 3 inches, but no more than 6 inches thick with firmly affixed door trim at least ½ inch wide. Adjustable straps allow you to size and adjust the Johnny Jump Up to accommodate a baby's changing height and weight, as well as a particular doorway's dimensions.