Make your own travel board games! This blog is full of a bunch of DIY kid things. This is so clever - magnets to hold the game in place. My boys would like this just to keep the baby from messing up the game
Calm Down Jar. It is really easy to make. The goal is that when they are feeling out of control, they shake the jar, then sit and watch the glitter settle in the water. When the glitter settles, they can get up. This one is a really great technique to use in lieu of timeout.