CityChook
Power Conserver
I take a 2 liter soda bottle and cut in half horizontally (with the neck on one side and the bottom on the other side). If I didn't do such a great job with the scissors, then I gently melt the cut edges over the gas stove burner. The kids take these to the playground sandbox or the beach to play with... it becomes a pail with a funnel. I'm amazed at how long my kids will play with this. And if it gets forgotten or broken, no biggie.