A.B.
Wal mart has a good selection and so does babies r us. We just bought our newly 3yo daughter a bike for her birthday as well. We got one from Toys R Us for like $60. I believe it was a 16" bike with training wheels and she is 37inches and 36lbs. She is the perfect size for it. I noticed that the 12" bikes did not have real tires on them so when by the time your kid is ready to take the training wheels off you'll need a different bike but the 16" bikes have real tires on them and should last a little while past taking the training wheels off. Good luck!!