What should i bring to Uganda; Africa for the children?

In around 6 months time i'm going to Uganda with my school for work experience. We're visiting medical centres and an orphanage. Through donations, our school is giving medical supplies and we're doing many projects out there, I know it won't make much difference, but I want to bring something for the children at the orphanage and medical centres, Just to give them something to have fun with. Is there anything you can think of that would be small, compact, yet fun and could fit in a suitcase.I'm taking extra baggage so maybe one or two suitcases full. I was thinking maybe frisbees, but they'll be easy to make and i can teach them how to make them. I'm bringing teddies for the babies and younger children, but i can't think of what younger teenagers would like. Any ideas? thank you! (: