Magic is fun, but it's always more fun to know how it's all done .
When complete, this will be a tutorial on using the abacus. Until then, enjoy what is here and look forward to what is yet to come. The classic abacus has two decks. Each rod on the top deck contains 2 beads, and each rod on the bottom deck contains 5 beads. Each bead on the upper deck has a value of five, while each bead on the lower deck has value of one.