Dear Dave, We just started teaching our seven-year-old about money. He’s very eager to learn, and he seems to be grasping the basic ideas quickly. He’s young, though, and of course he makes mistakes from time to time. Should we step in and fix things when a mistake he made means he can’t do something he wanted to do? Ethan   Dear Ethan, It’s always hard on parents when they see their children suffer because of a choice the child made. But sometimes it’s best to love them so much that you’ll let them make mistakes, and make sure they learn from them, while they’re still under your protection. Reality can be a great teacher when it comes to learning how the world works, and sometimes one sting from a bad decision when you’re young is all it takes to teach a kid a lesson that will last a lifetime. …