Agree and you might like 4D Toys! One of my favorite things for building a little intuition in different dimensions.
I like how it shows shadows and cross-sections from 2D->3D, and then from 3D->4D. Really captures the uncanny playfulness of it all.
I remember when that was dropped! It nicely complements Flatland, going in the other direction. Highly recommend, but it is easier to miss the limitations of intuitions here than it is when looking at Flatland. But still, highly recommend. I think it helps highlight how non-intuitive things are. I'd suggest people try to predict movements of things before that movement happening. Helps to see how wrong you are because we have a tendency to post hoc justify why we actually knew something was going to happen lol
In the same space (ahem) is things like 4D Minecraft, or 2D sliced 3D Minecraft.
I think it was a clone called 4D miner, but there seems to be mods for Minecraft too.