I have taught SCD patterns (but not asked for the correct step) to 5 and 6
year olds, but not to younger children. Those who cannot do skip change can
walk or skip and do just fine, although the coordination required for
skipping is often considered appropriate for slightly older children. The
books "Let's All Dance" and Let's All Dance, Too" have several good, easy
dances for audience participation and for children. They are available
through the San Francisco branch. Good luck! The children will have a good
time just moving to the music.