Security envelopes can be cut up into ATC (artist trading card) sized pieces at 2.5″ by 3.5″. Glue the pattern to your cut up food boxes, add some paint, some art, trade them with friends.

Ever get those “You’ve been pre-approved!” credit card ads? I look forward to those. The fake credit cards most of them include make great glue cards. Sometimes I hit paydirt and they send a plastic one. Reusable! The paper ones last about four glue sessions (one for each side) if you wipe them clean each time.

My daughter loves to play mailbox. At 8yo, we have a little metal mailbox that she and I make cards and send them back and forth to each other through. The only thing I found bad about letting a child play with junk mail was paper cuts. Return envelopes have sharp edges.

And yes I know it sounds paranoid BUT: Always teach them to tell you if they get a paper cut and make sure you tend to it; we do straight alcohol. It may seem small but Jim Henson (Muppets) actually died from a staph infection from a paper cut. Be vigilant.