Our six-year-old and his four-year-old brother have spent hours with this program. They love creating their own contraptions. We often hear them laughing with glee about the funny chain of events that they have created. The program looked complicated at first, but it has a very good set of tutorial challenges which teach you about how the various components work (gears, lazers, mandrils on conveyor belts, vials of nitroglycerine, etc.). Our six-year-old is now able to solve most of these challenges without any adult help. Not every child will enjoy this program, but if you have a youngster who is intrigued by technology and how things work, give this program a try. You may be surprised about how much they can learn from it at a young age.