Things You'll Need
Instructions
Look at the bike's rear wheel.
Find the bolts on each side of the wheel that hold the wheel to the bike's frame.
Unscrew one of the bolts with a crescent wrench. You may have to hold the second bolt - on the other side of the wheel - with a second wrench.
Look at the two training wheel assemblies. Each will consist of one training wheel attached to a metal post that has a hole in it.
Slide one training wheel assembly onto the place where the bolt was removed. Slide the hole onto the bike where you removed the bolt.
Replace the bolt and tighten part way with the wrench.
Repeat on the other side.
Adjust the training wheels so that they are slightly above the ground when the bicycle is upright. The bike should tilt a bit when one training wheel touches the ground.
Tighten down both bolts.