Find the bolts on each side of the wheel that hold the wheel to the bike's frame.
Step3
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.
Step4
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.
Step5
Slide one training wheel assembly onto the place where the bolt was removed. Slide the hole onto the bike where you removed the bolt.
Step6
Replace the bolt and tighten part way with the wrench.
Step7
Repeat on the other side.
Step8
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.
Step9
Tighten down both bolts.
Tips & Warnings
The training wheels should be designed to center themselves. If not, check that the posts are vertical - perpendicular to the ground - and that the training wheels are even before tightening everything down.
Gradually raise the training wheels as your cyclist gains experience and confidence.