Each letter in this font is a cube folding puzzle:
it is possible to fold the letter into a
1 × 1 × 1 cube
by folding only along grid lines,
but doing so can be quite challenging.
Each letter/puzzle is a rectangle with one or more slits (cuts).
To try out a puzzle, cut out a rectangle and the slits indicated,
precrease the grid lines, and try to make a cube.
Every puzzle is designed so that at least one of the slits is
necessary, meaning that the puzzle is unsolvable without it.