Stickers and kids go hand in hand. So why not have kids design their own stickers, right? My daughter made the one above (it's a smiley face). This is an easy project that's good for all ages. Simple directions below.
White Self Adhesive Liner - normally used to line drawers. I purchased in the closet organizing section of Target for about $5. You might be able to find it a the dollar store as well.
Cut a piece of the adhesive paper out. Draw on the paper with permanent markers (we found the color shows better with permanent markers).
*other ideas - use rubber stamps
*Another idea would be to use a circle punch, or any other shape hole punch.
*note: this a basic sticker just like any other sticker, it is not specifically made to stick on shirts. my daughter decided to stick it to her shirt and I let her