portable roads that are easy for kids to put together and will travel easily, made out of old denim and yellow paint. velcro helps them stick to carpet - awesome idea! I'm so doing this with a pair of my old jeans!
Rainbow Bubble Snakes - Need: Half a waterbottle, rubberband, bubbles (dishsoap/water), food coloring, sock. Steps: Dip sock held by a rubber band on the water bottle in food coloring in dish soap and food coloring and blow. Have fun!
A marshmallow (or other thing) popper from Real Simple. Cut off the bottom of the cup, cut off the top of a balloon, put them together, and then sling pop things around. Add some pretty duct tape around the cup to hold the balloon on better.