What is a "third wheel attachment"?

What is a "third wheel attachment"?

Pat Hines (Traffic Safety Educator & Executive Director, SafeMoves) gives expert video advice on: How do I ensure the quality of a third wheel attachment?; How can I keep my child safe while riding a third wheel attachment? and more...

A third wheel is an after market product that you can buy that attaches to your own adult bike. You attach it with a seat post. It's securely fastened there and it rides independently of your bike. It has its own wheel, therefore, third wheel. It has its handle bars and has a seat and has pedals. And the child can pedal right along with you, behind you and, if you had an idea of what a tandem looked like, it's almost like a tandem but with one wheel. And the child can have the freedom of riding a bike with you. You're bonding, you're together. It's higher than a trailer and a child can hold onto the handlebars as he rides with you. And it's a great way to enjoy cycling with your child if your child's not quite ready to ride their own bicycle with you.