The Tricycle BABY BUBU modular 4 in 1 accompanies children during the various stages of growth. Its main feature is the ability to adapt to the evolving needs of the child, offering different modes of use. Stroller with parental push, initially, parents can push and direct the tricycle using it as a stroller. Tricycle with parent thrust and baby pedal, as the child grows and acquires the ability to pedal, parents can continue to drive the tricycle while the child pedals. Tricycle with pedaling and child driving, with parent guide, once the child is able to pedal and drive independently, parents can remove the handle and allow the child to drive alone while keeping control on the direction. Independent bicycle, when the child is large enough and gained confidence in the guide, the tricycle can be transformed into a small bicycle. Additional features such as ergonomic seat, missing pedanes to adapt to the growth of the child removable rear basket and the folding hood add comfort and convenience to the experience of use. The iron structure durable, plastic accessories and high quality fabrics also promise durability over time.