Abacus

thingiverse

An Abacus is a classic tool for performing manual calculations. It's perfect for those who prefer traditional methods or as a backup during an apocalyptic scenario. To assemble the Abacus, you'll need to print four towers and two bases, then glue them together accordingly. Additionally, print 100 beads and use plastic filament as rods between the towers for functionality. For optimized bead placement, consider using Skeinforge's Multiply function or Tower function in your settings.