My son really likes to play with stickers but once he sticks them on paper that is it so we go through a ton of stickers. Recently my mom discovered the Melissa & Doug Reusable Sticker Pads and gave one to my son. They are fun and educational all wrapped up in to one.
Today on Amazon you can score the Melissa and Doug Habitats Reusable Sticker Pad for just $4.99 (originally $6.99) and it will ship for free with a qualifying purchase of $25 or more or an Add-on item for Prime members.
This is a great price for this product and it would make a great inexpensive birthday or Christmas gift. It also makes for a great car trip activity.