Our almost four-year-old is very precocious. In several areas, she is way advanced for her age. While we want to encourage her to learn, we want her to have fun and be able to discover things on her own as much as possible. Since it's designed for preschoolers aged three and older, this set gives her a great start on basic math skills.When I first opened the package and tried to use the pen, it didn’t work. I couldn’t figure out how to turn it on and off. I looked in the box, and there were no iSee full review