Most of the computer chairs that are out these days have some kind of way to adjust the backs of them. Simply tie one of the cat toys(the kind that have about a foot or more of elastic attached to a toy) to this. By leaving more slack in the line you can hold the elasticand make the toy bounce, swing... whatever they seem to prefer! I saw this done at my mothers house and was surprised how well it works. Also I've found the girls playing with it when I come home from work, it kind of sways back and forth off the ground. Maybe more of us will find we can type with less mistakes, without four paws on the keyboard!!! Hope this helps ya'll
Nicole
Nicole