I was just talking to one of the ECEs at Early Years this week who says that tracing pictures is BIG with after school kids and has been keeping them busy for weeks.
I am not sure that everyone would like that but she seemed pretty enthusiastic
The other thing that worked when I did after school was games of MEMORY. They loved that! And also play dough and pipe cleaners. I didn't tell them what to make with the playdough or pipe cleaners but they would look at the sample pics and just try to make something
Oh and of course you can never go wrong with just letting the older kids play outside and burn off steam...some balls, tag...etc