Flutter: Cards UI/UX

Hey guys, I’m new to flutter and I’m trying to recreate the following layout in order to improve my skills, but I’m not sure how to do that, and I would appreciate it if any of you could help me with this problem.

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I have a page that is going to display a list of card widgets with some widgets inside them.
The cards have been been the ORANGE and DARK_RED rectangles.

THE PROBLEM

How can I make that at the moment when the user will press the ADD button to add another card on the top of the old one? At the same time, I want the card below to be a bit bigger in order to make the distinction between them.

Is there anyone how knows how can I achieve this? Or is there any package that can help me a widget at list somewhat similar to what I need?