gasman

I've been put in charge of the childrens classes while their teacher is in Japan. Rather fun, but some of them are quite young and quickly loose concentration while doing techniques and need games breaks to prevent them from being bored. The older ones want to practice techniques and complain if there is too much playing games. I've been able to balance it so and so to keep both happy, but would like some advice on activities:

So... any good aikido related fun and games for the young ones out there?