Wii Dilemma

So Michael's birthday is coming up (April 15th) and we have been talking about what he might like for the big day. He has brought up that he might like to have a Wii, but we needed to talk about it a little more... easy enough right?
Mommy Mistake #1:
I got suckered in to the hysteria that is finding a Wii. I happened to go into to Target yesterday and asked about the Wii. The guy spoke to me as if I was trying to discuss some evil plot. He finally let me see the Wii that they happened to have in stock and told me that if I wanted one in the next few weeks I better get this one as they are hard to come by. Well I bought it. Not so bad, right?
Mommy Mistake #2:
I have to admit I was a little excited about the purchase. Zack has really wanted one and I thought this would be a fun family toy. He gets off the bus and I share the secret with him, I even SHOW HIM THE BOX. What is wrong with me??? I'm not new at this!!!! ugh. So I tell Zack that this is a secret and we can't tell anyone!
Mommy Mistake #3
Carter wakes up from his nap and Zack is dying to tell him. He begs me to let him tell Carter, and I say "If you tell him and he tells Daddy then we will have to take the Wii back to Target". So I let Zack tell Carter. Carter was not near as thrilled as Zack was...

So Michael comes home from work and Zack ever so casually says "So, Dad your birthday is coming up" and without missing a beat, Carter chimes in "And we got you a Wii!!!!!". Zack was devastated and went outside to sob!!! He knew the Wii was going to have to go back.

So after Michael gathered himself, we told Zack we would have to talk about it...
I made A LOT of mistakes on this one!!! What was wrong with me. So we can't decide what to do now! Should we return it and let it be a lesson to us ALL or keep it and chalk this one up to stupidity. Who knows!!!