What's the safest way to carry your child on your bike?

With a helmet. Children and their parents should always wear a helmet when riding a bike or being towed in a trailer. Bike trailers offer a comfortable haven, your child can be strapped in and have room for some diversions and snacks. Avoid bike carriers for infants-they don't have enough head control for a safe ride.
Bike carrier. Use a baby bike carrier specific for the type of bike that you have.