Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Biggest Disappointment

My girls were really excited when they saw this gift. But the excitement stopped there. Every experience after the pretty picture on the box was a nightmare. It took forever to put together and the removable chasis made it very difficult for my 3 and 4 year to interact with it. The chasis never hooked on the other trains correctly and the colorful train was only a loose plastic cover that rode on the stand alone chasis. If you try to pick up the train, the chasis would drive itself and the kids became confused. Everytime the kids touched anything, they would need an adult help put it back together. My oldest said that she hated this toy. I now wonder if I should by anything else that has to do with Thomas the Train. Do not buy this toy!