This is one of at least three things he built today. He also is working on re-creating a game he built last night that was inspired by the game "Mouse Trap". What a talented kid I have on my hands!
"What makes people smart, curious, alert, observant, competent, confident, resourceful, persistent - in the broadest and best sense, intelligent- is not having access to more and more learning places, resources, and specialists, but being able in their lives to do a wide variety of interesting things that matter, things that challenge their ingenuity, skill, and judgement, and that make an obvious difference in their lives and the lives of people around them."~John Holt~ Teach Your Own