PVC waterfall: Pop Pop project made three and has plans for a fourth. The grands love their "car wash" as they named it. Spread out the sprinkle holes when drilling in a back and forth pattern for a more interesting water pattern.
This would be a great way to make your own sprinkler system for cheap! I looooove it! All you have to do is make your frame out of PVC pipe, drill small holes in it, along the entire frame, then add a hose.