Look it up!
Here's how Stu helps his kids find their own answers:
When my kids ask, "How do you spell...?" I reply, to whatever word they ask, "d-i-c-t-i-o-n-a-r-y"... Pretty mean, right? [No, pretty smart. If you use Firefox you can add a Websters.com widget to your Firefox Search. -- Ed.]
Also, if they ask for the story behind something, I grab one of the laptops do a search for it on Answers.com and then we read the answer together. Lots of fun to be had there (at least it's fast, which the kids appreciate).