I bought this for my son, 9, an avid LEGO fan in an attempt to spark a new interest with something educational. After opening his gifts, upset that he didn't get any more legos, he opened the box and decided to see what it was about. From 9 am until 6 pm he played with this toy non stop and LOVED IT! He built many of the projects, took it apart, and built some more. Around dinner time he bought the set to his uncles house and the two of them sat around playing with this some more. My uncle, an electrician by trade, enjoyed it just as much as he did. I really, really like how kid friendly this toy is AND how it teaches children about electricity. I would definetly recommend this toy to parents- you CANNOT beat the price, the hands-on educational experience, and the fun children will have arranging the little units to make music, alarms, causing light bulbs to light and propellars to rise. Amazing! Wish I would have learnt about this thing sooner!