I've already picked up two or three of Melissa & Doug's festive Puffy Christmas Stickers playsets for my nieces. I might stash one in my handbag, too, for keeping kids occupied when I meet their moms for brunch at a restaurant. The playset is inexpensive, and comes with 63 charming and colorful stickers.
The puffy stickers are reusable, and the playset comes with a couple Christmas house scenes to arrange the stickers around.
Great for car or airplane trips to Grandmother's house for the holidays!