I would play this game every morning with my little ones around the time they had turned 2 and 4.  
I would kneel down on the floor, in a position where I can stand up.
They would each climb up one leg, and I’d onto them, rocking them forward and backwards while saying “roah, roaaaaah”.  They giggle.
Then I’d stand and run around with them!  Pure delight!
“Roah Roah game, takes to the sky,
Roah Roah game, time to fly.”
And I run around holding them while they giggle.
It’s like a minute-long hug filled with bursts of laughter.
One of my favorite games ever to play with them!