I think, however, that giving him things which are in his perseverative area of interest is your best bet for keeping him entertained. If he likes dinosaurs, for example, get him a bunch of dinosaur books. If he is interested in science, then a microscope and slides that he can look at is good.

In short, anything that he already shows an interest in to the exclusion of anything else is fair game for developing and keeping him busy. The areas where we perseverates are his strong suits, and helping him develop them increases his chances of success in life.

He should also be interested in any of the Leap Frog activities and games, not to mention that these kids frequently love computer games.

There are some cool interlocking puzzle games called Hexabits that I have used with these kids. They like to manipulate things and figure them out.