Recycled Skateboard Guitars
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Paper towel rolls...
Re-use toilet paper rolls for starter plants.
DIY can grill
DIY: hanging notepad
DIY origami newspaper pots for seedlings-- use instead of peat pots
Reuse old tires and make something pretty
Clever reuse idea: glass bottle watering "globes". These are particularly helpful when starting plants or if you're going on a short vacay.
Salvage wood with mason jar vases/containers