I guess Cathie and I are doing something right raising our kids.  I went in to check on Madeline tonight, and found a letter that Nate had written for her:
Dear Madeline,
I love you very much.  You are the best sister ever.  You relely iproved on your jim nasticks.  You did reley good on your dance resital.  You are the nisist sister ever. 
Love,
Nathan

Sometimes, I wonder how we're doing as parents.  This kind of stuff sure helps.