The Domino Train was bought for my 3.5 year old son. It was very easy to install the batteries and get to playing with it. You load the Dominos into the long cartridge by sliding one side of cartridge open and lining up the Domino's inside. Then close the cartridge and insert it into the top of the train. The trains smoke stack can twist left and right and guides the trains direction a slow left or right. Turning the train on, it successfully moves forward while dropping Dominos behind it, in a perfect stand up position. My son had hours of fun with setting them up and knocking them down. Being 3, he needed help loading the cartridge but will figure it out soon by himself. I highly recommend this for a fun, unique gift for a kiddo.