Bike trailers are perfectly safe for toddlers and older children. They’re stable and secure, practically impossible to flip over no matter the road. And even if in some unfortunate event your bike tips over along with the trailer, your child will be protected thanks to the enclosure and safety belts. Because all trailers come with either a 3-point or 5-point harness safety system, they help keep the child securely seated during the ride, however, this doesn't mean you should forego a child bike helmet.