Hallmark has the Elf on the Shelf kit on sale 40% off for $17 plus tax - it's normally $29.99. I found it at my local Hallmark store.
I don't think it's available online for that price.
Here's a link to the amazon details (they're selling it for $39.99) that will give you the description and reviews. This is exactly what is at Hallmark right now.
Elf on the Shelf