Fun Things for Kids In San Diego! Indoor and outdoor activities are just a few. Arts, camps, museums, beaches, attractions, Belmont Park, trampoline and rock climbing. There are activities, arts and sciences galore in San Diego for kids and families to enjoy. The must-sees are the major attractions and museums that will entertain, amuse and most definitely keep the family busy all day. If you're looking for more of an outdoor adventure there are many water-sport opportunities from surfing to kayaking and the always entertaining outdoor amusement parks makes for a memorable day. For indoor fun you can't go wrong with museums, indoor play gyms, bowling or laser tag. All these wonderful venues are perfect for throwing a birthday party or just having fun! This section has things for kids to do coupons to make day planning, parties or events more affordable.