is it possible to animate features of a part???

i'm trying to animate a plate with two sets of holes. i want to start off with a blank plate, then the first set of holes, then the next set of holes (as shown with the pics i included). i tried suppressing the features, creating a key point at a specific time on the timeline and unsurpressing the features at different key points on the timeline. didn't work. any help would be appreciated, thanks.