I wanted to start out with something simple and fun to involve the children and thank them for what an excellent job they did singing for all the "grown-ups" in the congregration.
I was going to make a tree but realized I had the perfect tree in my Halloween decorations. Instead, I drew little pictures of pumpkins and leaves, numbered the backs, and then hole-punched them, before placing them on the tree.
Overall, I think this went quite well. Some songs didn't have an associated leaf because the song was too reverent for some of the sillier options a child could choose. The children responded very well to singing in "staccato," and "crescendo" and "decrescendo." Some of the pumpkins and leaves said, "teacher's choice" or "child's choice," and in one case, the teacher chose, "marching." That was a very fun way to sing the song. Alternating by boy/girl or eye color, on the other hand, were my least effective "leaves" so I won't be trying those options for some time.