Instruct: Classify Amazon reviews into positive or negative sentiment
Query: We just don't get it.

My two boys, age 9 & 11, are avid builders of Lego, Keva Blocks, Playmobil and Rokenbok. They have had the set for 2 years and haven't built anything but a light sabre. I put it away, then bring it out at a later date hoping to spark their interest. They have great imaginations but just can't seem to engage with this set and I'm not sure why. It's just not very interesting to them.