If you ever want to see a kid run and scream and holler then just break out the bubbles. I don't know what magical property they have but it works like a shot of pure lightning to set Mr. Energy running around a room at top speed.
We got a little bubble machine - a hand held one like a bubble gun - and believe me you never saw a kid more excited. Sure my daughter was happy too. She's four and four year olds love bubbles. I never knew a kid who didn't like bubbles. But Mr. Energy got so wound up he couldn't even begin to hold it in. Jumping, hollering, running in circles.
He's quite the sight to see when the bubbles come out and of course its a pretty good way to wear off some of that energy so maybe he will sleep a bit better tonight.