Learning a Word

My daughter was playing those good for nothing video games, then she ran to me and asked me: What is stamina? I don't know, I said. Can you please look in the dictionary, mom? Well, it may be good for me to learn that word today. I went online and found out what it means. She read the meaning, said "hmmm, now I know", and ran back to playing. I guess something good does come out of video games.