<p>There are a whopping 10 sounds for you to guess in this episode. Are your ears up to the challenge?</p>

How do engines work? (Road trip pt. 1)

Brains On!® is a science podcast for curious kids and adults from American Public Media. Each week, a different kid co-host joins Molly Bloom to find answers to fascinating questions about the world sent in by listeners. Like, do dogs know they’re dogs? Or, why do feet stink? Plus, we have mystery sounds for you to guess, songs for you to dance to, and lots of facts -- all checked by experts.