This first product is organic and has great reviews!
From Amazon: Certified Organic Cat Grass Seeds by Handy Pantry – Non-GMO Wheatgrass Seeds for Cats, Dogs, Rabbits, Pets – Wheat Grass Hairball Remedy for Cats – Hard Red Wheat for Your Home Cat Grass Kit (12 oz.)
This 2nd product comes with a tray and is very affordable.
From Amazon: Handy Pantry Organic Cat Grass Kit – Includes 1 Tray, 1 Soil Puck, and Non GMO Wheatgrass Seed – A Healthy Treat for Cats, Dogs, Rabbits, and More.
This third product comes with a cute wooden box.
From Amazon: ENPIN Wooden Cat Grass Planter (no Seeds Included) with Anti-Digging Design, and Removable Plastic Liner, Durable, Leak Proof Wheat Grass Growing Pot, Cat Grass for Indoor Cats Pets (Vintage Blue)