This think is amazing!! Just finished assembling it for my 3 year olds birthday tomorrow.  He is going to LOVE it!  The lights are amazing and the added touch with the radio is so fun!  Just a few things for feedback.  I can't tell if you are supposed to charge the battery before use.  It doesn't say anywhere on the instructions.  Speaking of instructions, the instructions are awful!  One of the worst I have seen.  Pictures are very tiny and the descriptions are run on sentences.  Luckily, my husband and I were able to figure out and assemble in about 1.5 hours.  Would be 5 starts for sure if the instructions were better!