How?
Mat time with group
One on one with child on lap or in front of you to help
Arms out at side of body. Life and lower arms in time with words
Place hands on hips and wiggle for 'hands in the middle', or rub/tickle tummy
Why?
Learning of language concepts
Matching words with actions
Can be modified using an object or ball
Two word combinations e.g. 'Arms up'