Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very cool idea...hope I can get another

I ordered this as a present for my 5 year old daughter. She loves the rainbows but is as disappointed as I am that the gears don't turn.Reading various sites I learned that these devices are very sensitive -- they don't work in double pained windows, nor with screens. I took mine right outside at noon (no glass between me and the sun!) -- still no movement after an hour of direct "charging".I have written to the seller, am hoping they will understand. So many people seem to enjoy it right out of the box, that my guess is I just need a replacement (which I hope they will honor since it is more than 30 days since I bought it). I will provide an update.--------------------------------------------------Update:The company was great! They sent me a new one which works as described. I am planning on buying more because they give quite a colorful light show in the kitchen over breakfast, starting our days with a little delight.