My Aussie hubby calls it Chasing. The person who is "It" has to catch someone else and touch them. Then that person becomes "It" and has to touch someone else. When they touch someone they say "Tag! You're It!" The word "tag" in this sense is a verb meaning "to mark". "It" is the principle player in any game who leads the action or has to perform the main chore (in this case, catching the others).

Follow the leader is when the leader runs, jumps, walks or does whatever and everyone else has to imitate and do the same.

Tess