I bought this for my grandson and he is having fun taking apart and attempting to put back together. However, there doesn't appear to be anything that that will light up or make sounds on the blue car. The yellow car will make a brief "start up" sound when button pushed but that is it. Disappointed as I would have given this 5 stars otherwise.Within hours of posting the above review, the company contacted me apologizing for the issue. They IMMEDIATELY sent out a replacement car. I received the replacement today along with a lovely handwritten thank you note. I didn't think this level of customer service existed anymore! Now, I am ordering a construction set for my grandson.