A bouncy castle is wonderful fun for a group or party of kids. The castles are big enough for several children to be inside at the same time, jumping and playing, while the inflated walls protect and keep them from falling out. Kids love bouncy castles! Bouncy castles lets your children and their guests jump and bounc to release all that "kid energy". A bouncy castle sets up quickly, it inflates with a blower in about a minute.