Up-Down Tolerance Test & Fidget Toy

Shake it. Press it. Watch it pop!This two-piece fidget cylinder combines printer tolerance testing with a fun little kinetic twist.The design features:An outer cylinder with an openingA smaller inner cylinder (same height, narrower diameter) that fits insideInternal stop tabs that keep the inner piece from falling outSmooth sliding action that lets the inner piece bounce when shakenHow it works:Push from one side and the inner cylinder peeks out the other. Shake it up and down, and it pops back and forth like a mini pogo stick — all without springs.Perfect for:Checking if your printer can handle tight millimeter tolerancesStress relief between printsImpressing friends with a "printer test" that’s secretly a toy🖨️ Print NotesPrint-in-place: No supports neededWorks best with 0.15–0.2mm layer heightKeep tolerances tight for a satisfying “pop” — loosen for smoother motionPLA recommended for first test, but PETG/ABS works for more durabilityNo assembly required — just print, pick i