Mushroom

thingiverse

Japanese erasers and keychains have long been popular among children, often seen hanging from backpacks. In addition to their play value, these erasers are great 3D learning tools, according to Bob Krause of Inventor Studios in Berkeley, CA. When disassembled, they reveal basic 3D shapes that can be modeled on a computer and printed as keepsakes. These objects also help young inventors develop joinery skills. The best designs are those that consist of multiple pieces that are interesting whether assembled or separated. Krause's creations, along with others on Thingiverse, are useful exercises for anyone learning 3D modeling.