Soak your feet in cold water.
Play with a toad.
Watch family movies together.
Build minions. :) Play with them. They are fun to balance on doors, stack and kick/knock over, and to give names. :)
Wrap a cold cloth around the back of the neck.
Turn on lots of fans.
Eat slushies. Consider making these ones.
Put no pressure on yourself to accomplish anything. Succeed. :)