This is a simple stand for sprouts cultivation :) In Poland it's one of traditions to plant a garden cress before Easter - we call this plant "Rzezucha". It's great for salads and sandwitches :)
Instructions for use:
1) Print a thing
2) On top of dome put a piece of lint or other fabric
3) Moisten a lint with some water
4) Spill out the seeds
5) Water the seeds every day until they sprout and grow a little bit :)
This is really easy for printing - thick layer may be used and no supports are required. I used PLA and 0.3 layer height.