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.

Top pop-up Christmas card for the money 3D Christmas Cards Pop-Up Greeting Cards What you need to know: This affordable set of pop-up cards is more durable than some other options available. What ...