Activity for Alexis

Do the flower girl and ring bearer usually stand at the Alter after walking down the aisle? Or do they sit with their parents in the row? Also, do they walk out at the end of the ceremony as well?

My fiancé and I really loved the idea of having a peanut bar at our wedding. For any of you who have had peanuts at your wedding, how did you prevent your guests from throwing all the shells on the ground? You would think it would be common courtesy...