Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great fun for 6 years old and above

I brought two tomagotchi V4 for my two daughters as Christmas gift, they loved the little thing very much and spend a lot of time taking care their little pet.One tamagochi worked perfectly well but the other one "hung" twice: the little pet completely disappears, like running out of battery. I have to reset it and then it will start over again from "egg hatching", with no memory of pervious character. My 8 year old cried when this happens ! Overall it is a great toy but do need more quality control.