If you’re interested in doing gel electrophoresis (e.g. for DNA fingerprinting) at home, there are certainly easier ways to get a gel casting kit, but I wanted to throw some more props at Thingiverse user cathalgarvey, who recently also brought us a printable microlathe and a printable centrifuge attachment for a motor tool. He’s fast making a name for himself as a forerunner in the design of practical printables. Might I suggest a printable microtome next?
From the pages of MAKE: