Beware if entertaining using these kaleido trays—you could find yourself spending hours placing them into different geometric shapes and arrangements.

They come from the brain of Clara von Zweigbergk, a former graphic designer. They come in more than a dozen shapes and colors, ranging in price from $17-$84. It says they're not actually okay for food use, which severely curbs their cool factor, but you could easily find a ton of other uses for them around the house—including a new party game. [A+R Store via Design Sponge]