If you think you're a decent speaker of a second language, try spending a full hour narrating a simple suburban environment to a small child. You will very quickly discover gaping holes in your vocabulary that the average three year old would absolutely school you on. What the hell is a slug called? How about a digger? How do you say I'm stomping my feet? So this solves two problems at once: it has greatly improved my spanish, despite the fact that I'm often just talking to myself, and it has...