Martin is excited about giving his friend Sasha a special gift — he wants to make her a microscope. When he is faced with the actual mechanics of how to make a base and an eyepiece and a lens out of the materials he has — he nearly gives up. But then Daddy tells him that the most important thing any builder or inventor must have is grit: sticking with it, especially when things are difficult. Martin hears him and then turns to his project with new determination — and in the process, comes up with some new ideas...