Question: what to do on a hot day?
Answer: Make Creative, Wacky Popsicles. There's nothing better than a cold popsicle on a super hot day. ... 
Play Water Balloon Baseball. ... 
Paint the Fence/Ground With Water. ... 
Cool Off in a Homemade Backyard “Kidwash” ... 
Engineer a Water Wall. ... 
Set Up Water Gun Races. ... 
Play Angry Birds With Water Balloons.