If you like to grow food,you should try floating them. A plastic drop cloth, a simple OSB sheet and some scrap decking or 2x4 is all you need. You can grow a ton of leafy greens really easily.they are worth the money.. they last forever.
i got a bunch of them. but ive never used them the way they are supposed to be used. i use them like a normal seed starting tray.. no floatation.