Hi! I might have an idea for you. Do you have a box of cereal at home? Or a book with an illustration on the cover? Try placing the box or the book in the same spots as the light blue shapes. You’ll see that the central symbol changes depending on the perspective, and that’s exactly the point of the exercise! It’s a mental exercise that takes a little practice, but once you get the hang of it, it’s like riding a bike, you never forget. Start with the basic 2D shape, like a picture on a cereal box or figure on book before moving on to the edges that add depth , such as children’s building blocks. Let me know if this helps or if you’re starting to get the hang of it.