Child's Tag-along Accessory 

Child's single speed Tag-along, available only with hire of an adult bicycle. This is a half-bike with a rear wheel, handlebars, seat and pedals. It is attached to the seat post of the adult bicycle. Children using a tag-along must be big enough to pedal (usually about 4 yrs to 8 yrs), and able to balance on the seat for the duration of the cycle.