Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best gift this Christmas

My 6 year old son received this for Christmas and hasn't stopped playing with it yet. Every free moment he has is spent in his room "imaginexting" as he says. I feel it is great for his imagination, he is constantly building and rebuilding in different ways and even I enjoyed playing it with him. I can see where this toy could be a little frustrating for younger children because of the way the walls snap together and probably wouldn't recommend it for a child under 5 unless the parent is willing to build the castle instead.