I bought this toy for my son's 5th birthday and he loves it. It is easy to put on, after me helping him to put it on initially, he can now do it himself. It is easy to operate - press button to operate light, twist face to chance light to 3 different colours, and click disc round to change alien in viewfinder. He can even turn the battery on/off himself to "save the light"! Is best played with in low light, the only slight critisim I have is that the image is not as sharp as I would have thought but this doesn't seem to effect my son's enjoyment of it. Worth buying.