Sprout sat down next to me while we were eating our dessert and said, "I want to talk about cars and motorcycles and how they work."
Me: "Hmm. Okay, well I don't know very much about that."
Spud: "Okay, well just tell me about how engines work."
Me: "How about we find a video?"
So we watched these two videos and I learned quite a bit!
Hooray for the Internet and YouTube!