Got this for my sons birthday and he loves it. Takes minutes to setup, does not take up huge amounts of space and a great introduction into train sets for my son. There are three carriages, one being the engine compartment, one being the centre carriage and the last being the rear. The train can go round the whole track through a small tunnel and over a crossing, or just loop round a smaller circular track. There are two speed settings, normal and fast. The engine carriage takes one size C battery, so make sure you buy some if you don't already have any.
The short video clip shows the train set running from a close range. It may look bigger than it actually is, but it's relative in size to a "matchbox" size car, so a good size for younger kids.