How do I solve the puzzle with ten symbols each with six boxes?
It's a purple room off of the giant throne room in the sky warp zone with a platform that has six purple crates and a pillar with two columns of five box symbols.
That room is showing unfolded cubes (called nets) in 2 dimensions. There are 11 different ways to unfold a cube and only 10 shown on the pillar.
Here are the 11 cube nets:
Lay the blocks out in the missing 11th way.
See image below:
Use the six cubes to make a Z-block:
This last setup is the last/11th (unpictured) way to unfold a cube.