Activity Homepage: http://activities.sugarlabs.org/addon/4293 Sugar Platform: 0.82 - 0.88 Download Now: http://activities.sugarlabs.org/downloads/file/26857/abacus-1.xo Release notes: New abacus activity * Chinese (suanpan), Japanese (soroban), and Russian (schety) models Sugar Labs Activities http://activities.sugarlabs.org