I got the abacus for my son about a year back , all that he did with it was to move the beads up and down, but mostly all the beads together at once. He hated counting beads, and would normally not make it past even one line of beads. Today I was surprised that at one go he counted all three lines of beads, without a break ….and I must add we had not touched the abacus for last six months, nor have we actively tried to teach what he is doing in the video. My point is that as kids grow their attention span grows and they grasp things naturally without them being force fed. My son is 4 and half years now and I am happy with the pace of his learning.