Game of tag on a scorching hot day, squishy sponge balls are summer's alternative to snowballs. Made from dollar store kitchen sponges that are cut up and tied together, they last longer than water balloons and are softer and splashier than regular balls.
Take a 2 liter soda bottle, poke holes in it. Attach to a garden hose. Toss over a tree branch and let hang for a kids water sprinkler. You can loop it over a tree branch and let kids bat it around for more watery fun!