Squinkies Surprize Inside Bubble Packs ($9.99) comes with 16 collectible Squinkies, including four hidden "surprise" Squinkies. They are sold at most major retailers including Target, Toys R Us, Walmart and Amazon.com.
These make wonderful, fun presents so if you have any last minute Christmas shopping to do, look for Squinkies!
Disclosure: I received a bubble pack for the series 7, 8, 9 for review purposes. I was not compensated in any way nor required to write a favorable review.