The tri-bike is a 2-in-1 balance bike that can be reconfigured from a trike to a two-wheeled bike as the child grows. The package includes all parts and tools for three wheels and two wheels, so you can make it a three-wheeled or two-wheeled at home at your child's timing. It can be used in a recombination. After graduating from two-wheeled, they return to three-wheeled vehicles and pass on to their younger siblings, and then connect to the next. Parts are also available for each.