When my son gets into something, he's into it, fast and furious. Then on to the next thing. Sunday, it was yo-yo-ing. He even invented the verb, Yo, meaning to practice yo-yo-ing. Sentence: I'm going to go yo. But last week, it was origami frogs. He made an army, or 36, of them out of extra response cards I brought home for him. If you'd like to make your own army of frogs, here's how.