Hi there. I'm making an interactive "I spy" PowerPoint game, and I was wondering if there's a way to use code or other trigger methods to make an action button appear after all the all the other objects in the slide have appeared via animation.

To clarify, the player has to find 3 objects in the picture and click on them, which triggers an "appear" animation. After the user has clicked on all the objects in the slide and they appeared (which is totally random, I can't know the order in advance), a final object will appear - a "next slide" button.

Can this be done somehow?