This has easily been the most popular enhancement so far this year! The children have affectionately named it the pom-pom game. You will need some cups (I got these funky looking monster ones from the pound shop), a marker pen.
I've got a dark blue ceramic pen waiting for me. And there are white plates and bowls on sale down the road. Creative: Eleven Ceramic Projects To DIY (via funnelcloud: DIY hand-painted ceramic tealight holders)