Episode Details

Who invented the Pencil? What do the numbers on Pencils mean? Do Pencils really contain lead?

Have you started your FREE TRIAL of Who Smarted?+ for AD FREE listening, an EXTRA episode every week & bonus content? Sign up right in the Apple app, or directly at WhoSmarted.com and find out why more than 1,000 families are LOVING their subscription!

Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more, at Who Smarted?