Bottle Bank via Martha Stewart: transform a used plastic bottle into a cute piggy bank. Could use same idea to made little containers for kids to store their collections too (use bottle with wider opening and don't make slot)
Terrarium DIY: Turn an Old Soda Bottle into a Miniature Rainforest! (Crafting a Green World)
DIY your photo charms, compatible with Pandora bracelets. Make your gifts special. Make your life special! DIY Home Sweet Home: Diy Cloche From a Soda Bottle - this is for halloween but you can do it with other things like flowers , ceramic angels or .