The actions pretty much speak for themselves. Open and close your hands twice then clap three times. Open and close your hands twice more and place them on your lap three times. Then walk your pointer and middle fingers up your body towards your mouth. It is hard to sing keeping your mouth open so you need to exaggerate the open part. Right at the end you move your fingers as quickly as possible to behind your back.
Open shut them, open shut them
Give a little clap, clap, clap.
Open shut them open shut them lay them in you lap, lap, lap.
Creeping crawling, creeping crawling right up to your chin, chin, chin.
Open wide, open wide…
But do not put them in.