Comic Book Coasters are relatively low-cost, but they are a bit of a time-suck. So it's super important to have an alternate activity to occupy their time while they wait until their layers of Mod Podge dry. My suggestion: Scott Pilgrim vs. the World!
Based on the delightful graphic novel series, Scott Pilgrim is full of quirk and snark and should please the vast majority of your teens.
But I digress....