Call each new motion as you sing LOUD and CLEARLY
I’m singing in the rain
Just singing in the rain
What a glorious feeling, I’m…
Tick tock , tick tock , tick Tock TOCK
Tick tock , tick tock , tick Tock TOCK

(Or another option is)

Ta ta ta, ta ta ta, ta ta ta, TA
Ta ta ta, ta ta ta , ta ta ta, TA

Add Motions:
Thumbs up
Chest out
Knees bent
Toes in
Chin up
Tongue out
Flap like a duck