Our family has been looking at them for my niece that turns 3 on Christmas day. It would probably be her Santa gift. I read through a bunch of the reviews on Amazon. There were a few disappointed ones, quite a lot that really liked it, but a couple comments that make me hesitant about it were about batteries. Apparently the cycle itself takes batteries and there isn't an adapter so you can plug it in instead? Seems rather silly, but looking at the box at Costco, it looked like that is the case. Anyone know for sure?