The 1x1 sticker tiles sort themselves by granular convection [1] to the bottom of a Rubbermaid tote just like the sunflower seeds in a snack mix. In our house, they frequently get neglected except as gems/coins/treasure to fill a pirate chest. The large plates and bricks float to the top during shaking and digging.

[1]: https://en.wikipedia.org/wiki/Granular_convection