io9 These Monster Mash-Up Baseball Cards Are Freaking Incredible Artist Alex Pardee teamed up with Topps to make some unforgettable baseball cards—including one exclusive to io9.

Pop up cards are quick and easy to make. Start by making a few simple cuts into a piece of card, then can create a tab (or multiple tabs) that you push forward and decorate.

Assorted pop-up cards can be obtained in sets of a couple at once or you could buy individual pop-up cards. A 3D pop-up Christmas card is usually a little cheaper if you get multiple at a time.