Hallie LOVES being the baby! Often times Melissa is the mommy, Micah is the daddy and Hallie is the baby. Nate and I call each other "babe," so I will hear Micah and Melissa calling each other babe when they are playing house.
Another activity the older two kids have been enjoying is puzzles. I went to the dollar store and bought a bag full to pull out for a rainy (or at that time, snowy) day.