I want to begin teaching my son the basics. Letters, numbers, shapes, colors. I am so overwhelmed with the amount of information I don't know where to begin. So far I have printed out a few coloring pages(worksheets) to do. But I don't know what else to do for him to help learn the letters. He is not a sit still kind of kid and I will maybe get 20 minutes of his time. So the activities have to be fun and engaging. He is 3.