Unicode

This will display all unicode characters for 0.2 seconds each.
As there are 143859 unicode characters, it will take 28, 711.8 seconds to display them all!
You can press space, or click/tap the screen to pause, and then press the resume button (next to the green flag) to resume.
As it is clearly impractical to view them all in the project, if you see inside there is a block called "all of unicode" in the operators category.
You can click on that and then scroll through the list that appears to get an idea of how immense unicode is.