Materials:
Foam pool noodle
Duct Tape
Skewer or Ice Pick
Hose

Puncture the pool noodle randomly around all sides of the noodle. The more holes, the better spray. Take note of the photo. Stuff one end with a small piece of foam or plastic cap, then duct tape the end securely. Decide where you would like to use the sprinkler. Try it on the ground or hanging, possibly from a swingset. Position your hose and then slide the end of the hose into the foam noodle, pushing it in a few inches so it holds securely. Turn on the hose and the fun will begin!