L.L.
I recommend the Strider bike. It teaches kids to balance and glide--there are no pedals! We got one for my son when he was 2 and he started riding it in the house b/c it was the winter, but now loves to go outside for a bike ride every night! (He's now going on 4 and close to being ready for a big boy bike) Here's a link, you can also find it on amazon.com, http://www.balancebikeshop.com/strider_bike_s/14.htm