"My almost 4 year old son absolutely loved building this set with me. he put together the astronaut on his own, helps me find the different pieces and with a lot of guidance and patience ( on my end) we finished it with ease. I think it was about $10 at the store and i was surprised with all the extra little things it can do. the engines can go up and down. there is a little storage space in the back that you tuck the satellite in to and then "deploy" it once the shuttle "gets into space". he loves to play with it . I know it may sound weird,but this tip is for all the parents out there! We started using these smaller lego sets for him as a reward for going #2 in the bathroom. It has worked great so far!"