Choo, choo, choo, choo

Choo, choo, choo, choo
(rub palms together in circular motion to make a noise, slowly at first, gradually increasing speed)
Too-too, too-too, too-too ...........
(keep hands rubbing fast and call too-too for whistle)
Choo-choo, choo-choo, choo-choo
(rubbing hands gradually more and more slowly)
Ding-dong, ding-dong, ding-dong .....
(stop altogether and call ding-dong)