A fun way to introduce each skit or puppet skit is with a theme Song.  You can purchase c.d.'s with different songs to play at the beginning and end of each segment, kind of like a TV sitcom.  You won't have to tell the kids what is next or when it is over, they will here the song and know.  This also makes your service much more fluid, filling up the small empty spaces that usually occur during the service in between segments.
Tips Page