Animals! As long as they are slow or stupid enough to let the child to get close enough to touch them.
Other kids, these usually don't have to be ran down.
Being naked! Also involves running ... around the house and peeing on your favorite things.
Making you laugh.
Their favorite toy.
"Stop, mommy, stop! Why'd you stop?"
Getting down with their little bad selves by dancing. Even to the music on the weather channel.
Their favorite food. And who cares if they need a bath afterwards!
Giving you sloppy wet kisses.
This post was inspired by my daughter who was running around the house naked and happy as can be. Nothing puts a smile on your face like a happy kid. Feel free to share your happy moments in a comment!