Stations
Lisa,
The Sermon on the Mount is so big that it seems like there is too much to cover in one rotation, so you might want to pick just a few highlights and design them into 'stations' or consolidate them.
For example: in the Art Workshop, have the kids combine "Wise/Foolish Builders" and "Look at the Birds of the Air" into one diorama project that includes a quick build of a good and bad building, and the addition/decoration of birds.
For example; In the Drama Workshop, play Charades. Create a list of 20 sayings from the Sermon, write them on the board, and on slips of paper. Have students step forward and draw from the hat an act it out. Work in teams for fun.