Cardboard recycling.
Previously:
Cardboard and plastic bucket mousetrap - GIF
Cardboard and toothpick contour gauge - photo
Cardboard cutoff tool - GIF
Cardboard packaging padding shredder - GIF
Cardboard sniper rifle - GIF and video
Cardboard tetris game - GIF
Coin sorter made from cardboard - GIF
Homemade cardboard gameboy - GIF
Mini cardboard heavy equipment - videos
Bookmarks