1

One person is Elastigirl and stands facing the wall. Everyone else lines up some distance away.

2

All shout out "What's the time Elastigirl?" and she shouts back a time.

3

If she shouts "2 o'clock!", you take two steps towards her, and so on.

4

If she shouts "STRETCHY TIME", she can turn and chase you! The first person she catches then becomes Elastigirl.