The following above the horizontal line answers Question #1:
was the toy-stomping sextuplet in Animation #3

was the toy-stomping sextuplet in Animation #4

was the toy-stomping sextuplet in Animation #2

was the toy-stomping sextuplet in Animation #1

was the toy-stomping sextuplet in Animation #6

was the toy-stomping sextuplet in Animation #5

Here is the correct answer to Question #2:
Annie, Scarlet, & Quinn are the 3 sextuplets that tapped their feet on the floor.
Here is the correct answer to Question #3:
Queenie & Princess do the exact same sequence! Observe here how they move their feet on the 2 toys in the exact same way!
© Derek Cumberbatch