Hover to reveal stack of stickies

How cool would it be if I could draw a box around a group of stickies then click a button to create a “stack” of those. But here’s the really cool part. At any time, I can hover over the stack or maybe click on it and it will “pop out” into a grid of those stickies. When I close that, it goes back to being a stack. A lot of times we group related stickies together “underneath” a sticky that captures the main idea of the bunch to save space and declutter the board. But then someone asks a question related to one of the stickies in the stack and we have to “dig through them” digitally. Would be really cool to be able to see them all without actually moving them, then have them “collapse” back into a stack when we’re done.