Crayola Crayons

left olas are very important because they can be collected and remolded into new crayons. That's the project that a guy called Brian Ware was doing for hospitals in the US. They're called left olas. And that probably comes from the ola of Crayola, right? I think this is amazing. The etymology of this word, it's so ridiculous. It's neither chalk, nor oily. So it does seem bizarre to me to then give it the oil name. Well, exactly.