Nouns

(n)walker, baby-walker, go-cartan enclosing framework on casters or wheels; helps babies learn to walk
(n)handcart, pushcart, cart, go-cartwheeled vehicle that can be pushed by a person; may have one or two or four wheels“he used a handcart to carry the rocks away”, “their pushcart was piled high with groceries”
(n)baby buggy, baby carriage, carriage, perambulator, pram, stroller, go-cart, pushchair, pushera small vehicle with four wheels in which a baby or child is pushed around