Making some interesting projects for kiddos by yourself is a great idea to prove you are an omnipotent and successful parent. Kids are all fond of spending time outdoor, so you can do something makes their outdoor time more fun. Easy PVC pipe projects are
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!