It’s a fact: kids love water. They love to play in it, swim in it, splash in it, run through it, drink it and spray it. Here's a fun activity in which your child can play with some water on a hot day and learn something while he's at it. Have him build his very own mini waterfall! Your child will love the creativity involved with this project and he’ll get to work on his planning, problem solving, and architectural skills. Not to mention, he'll get a chance to cool off and goof off with some water the next time the temperatures climb.