I recently got a kit for making my own seed sprouts at a local grocery store. It's square and has four compartments for separate batches of sprouts at a time, or one after the other.

I got some ingredients together and tried it out with overwhelming success. Unfortunately I set too much material in the trays and the sprouts are pushing the lid off.

I started with Mung beans and Wheat berries, both excellent. My next experiment is Lentils and Quinoa.