Water balloons are fun, but sponge balls are a total blast! “These spiky guys are easy to make, don’t hurt when they hit their target, and ‘refilling’ them is as simple as tossing them into a bucket of water,” says Meredith Sinclair, author of Well Played: The Ultimate Guide to Awakening Your Family’s Playful Spirit.

Here’s how to make them: Pick up a bunch of sponges from a dollar store. Stack three on top of one another, and cut them lengthwise into three strips. Cinch them in the middle with a rubber band, then fan out the strips to create a ball shape. Fill up a bucket of water, dunk them in, then fire away!

Or make a game out of it by placing two buckets throwing-distance apart. Divide into teams, and stand behind the buckets, taking turns chucking sponge bombs into the opposite one. The team that gets the most in the bucket wins this water game! Whether your kids get a direct swish or miss, they’re bound to get wet in the process.