KDay is a periodic Hot Wheels event put on by KMart, where collectors show up bright and early - often with every family member they have. Everyone takes a number, and numbers are randomly chosen to open up cases of new Hot Wheels. Some people go, others don't bother.What is Kday?
If you're not much of a mainline collector, it's kind of a scam with the 20 proofs of purchase necessary, on top of the $3.50. But I've seen mail-in cars on Ebay for not much more, so that's also an option.Here is one of last years mail in that you got for your $3.50.