This really depends on having a law library in your office, but it’s fun, engaging, and nutritious. Get about two dozen small chocolate bars or lollipops and hide them randomly throughout federal and state reporters in the law firm’s library. Throw a few into the ALRs or Corpus Secundums of the world, just to shake a few things up. Then tell the kids to go find all the candy in the library. Librarians love this, because people actually use the library, but if anyone asks, tell them the kids are doing some research for you. That’s all you’ll need to say.