This engine is disappointing because the switch on the top is so difficult to operate. Too tricky for 2 or 3 year olds. Its small, stiff and hard to grip. My son often ends up pressing down on the engine to operate it, and after a couple of months has damaged and switch and misaligned the wheels! Pity, because otherwise its a great toy. The charge lasts for ages and its very strong - it can pull ten or so carriages with ease. The other problem is going over bridges. Unless the track and bridges are lined up with painstaking precision, it'll usually fall off the track (this was an issue before the wheels were bent).