Soda Pop Bottle Rocket Boosters! Cheap and fun! Paint two 2-Litre soda bottles w/silver spray paint, hot glue them together when dry and add felt "fire" with Hot Glue, and Hot glue them to a small backpack. I picked up one for a Dollar at Goodwill. This will be a go to for all of the kid Cheap and Fun. I use these as birthday party gifts now too!
Another upcycling idea: Cut off bottoms of water and soda bottles and paint snowflakes on them. Use hole punch near one edge for hanger...yarn, ribbon, wire, etc. Simple...good craft to work with children of almost any age. Too bad we don't drink soda!! @ CJ, nieces