Abstract: The present invention, in certain embodiments, a portable structure for supporting infants for the purpose of training and assisting infants to walk. The structure comprises a frame, generally U-shaped at the top with at least one J-shaped leg element being attached to the frame, with the J-shaped leg elements being parallel to each other, and with the J-shaped leg elements being padded. The frame may be made of a light-weight material, such as aluminum or steel tubing, wood or plastic, and the padding is made of a flexible, yet durable impact-absorbing material. The structure may further include a wheeled extension member attached to either the top of the frame or to one or more of the J-shaped leg elements.