I learned about these games from my son, who is in first grade. I think st math is a great program, though I think the challenge levels may be too difficult for young children, because they could negatively affect a child's confidence and natural exuberance. These puzzles are a fun challenge for adults, though, and I wonder what age they are meant for. It took me almost 5 hours to complete all levels in the dreambox standalone app, but I imagine they could be frustrating for many elementary school students.