Instead of succumbing to endless computer games and tv, I have a suggestion for a more meaningful activity for your kids (no, it's not assessment books).
It's typing.
We all know typing is an essential skill in the age of technology. Some schools organise a few sessions in primary school where the students get to learn typing during the school term. Andre had this in p1 or p2, I don't remember. But since it was held in a computer lab where the kids had to share computers, he didn't get much out of it.
It's clearly designed for younger kids since it has cartoon characters and whatnot. But it's systematic and very straightforward. You go through the exercises and advance to different levels. I found that it does its job pretty well in helping kids get the hang of where the letters are on the keyboard.
Where it's a little lacking is the practice exercises. If your children have completed this and you want them to hone their skills, there are lots of free sites which test your ability as you type. I downloaded one called Stamina which Lesley-Anne found pretty useful. It sets you exercises and tells you how accurate and fast you are.
There are many others available, some even come with games. Learning to type is certainly a lot more fun now than in my time!