This is our second order. I have a 9-year-old son who doesn't get tired of it. He like it so much that he asked for another set to build bigger things.
My son is enjoying using this pen. He makes all kinds of different shapes with it. Very fun and works as a great pen.
So cool! I bought this as a graduation gift for a high schooler going into mechanical engineering. After receiving it, everyone in the family now wants one!