Product derived from the eponymous TV series, this set includes a locomotive (Thomas, the hero) and eight curved rails which, together, form a circle of about thirty centimeters in diameter. Although the "Thomas" has the metallic appearance of old toys, all materials are plastic, but quality. The rear wheels of the locomotive, motor, have a bandage which notched, also helped by the shape of the rails, ensures excellent grip even on slopes and allows to climb on slopes up to 45 °. A screwdriver (Phillips) is required to implement the two LR03 / AAA batteries not included. After about 45 minutes of use, they begin to show signs of weakness and the speed of the locomotive to slow significantly. I think that new batteries must offer quality between 1 1/2 and 1 hour of battery life in continuous use (but it depends on the shape of the course and especially its slopes). With fresh batteries "Thomas" and quite fast. He completed his course in a 5s (hence the rate of about 1.5 km / h!). This toy starts and stops by means of a lever located above the cab. It's not very convenient, especially for small clumsy hands. Because of the extreme smallness of the proposed circuit, playability and interest are is virtually zero. So it does not seem reasonable dacquérir this one product. It will be better to buy a circuit to zoom up or as a base to expand a network. Therefore, the quality / price / interest is pretty average.