19 DIY Kids' Halloween Costumes That Are So Cute You'll Want to Cry: READY FOR LIFT OFF. Is your little one ready to explore land, sea, and sky? Two-liter pop bottles become rocket packs with a little spray paint and electrical tape. Or turn them into oxygen tanks for scuba divers by adding snorkel goggles and an all-black "wetsuit." See more at Delineate Your Dwelling.