i'm currently doing an assignment and i need to animated the buildings so that they will dance according to the beat of the music...

the dance i'm referring to is the buildings will go up and down (more like scaling up and down)...my question is wat are the easiest way to achieve this result? my online searching have lead me to only one solution which is expression...are there any other ways to do it?

photos and illustrated buildings, the thing is tat i want it to move according to the beat of the music