Mold Casting $ 🎓 💪

This is the process of making a rubbery mold of something, then filling the mold with plaster or similar substance to make an exact duplicate.    How exact a duplicate?  If you make a plaster copy of your fingers, the fingerprints will match what's on your hand.  Depending on the material, their may be some shrinkage/expansion.  You can intentionally make smaller or larger versions, by careful selection of the material.  While the original shirnkage/expansion ratio is relatively small, you can use repeat the process to make something twice as big as in real life or half as small.

It's cheap, easy, and doesn't take a lot of muscle.

It's got a good mix of male and female.   It's not that hard to do, teenagers kids can easily do it, as can seniors.

Dress for a mess, both the mold making and the casting involve liquids that turn solid.

I took lessons and bought my materials at "The Complete Sculptor".  When I took it it was a class called "life casting" and focused on making casts of living things, such as your foot, hand, torso, head (with breathing tubes), etc. You can just as easily do it with other things - toys, cups, etc.
Now they have called it Rubber Resin and split into two classes - 1) mold and 2) casting.  It's basically the same thing, but cheaper because of the split.

http://www.sculpt.com/