12. Indoor Herb Garden
How satisfying would it be to cook with herbs that are freshly picked from your own herb garden? Herbs are fairly easy to grow, and can actually be grown right on your kitchen windowsill where the sunlight can penetrate. Allow one month from planting for you to fully reap the benefits of your herbs.
13. Aquarium
Ditch the old fish bowl, and transfer your pet to a Mason jar aquarium. Put in some pebbles, a water plant, and maybe a fun toy to keep your fish entertained. A Mason jar aquarium is also easy to transport, so who knows, maybe soon it will replace the dog-on-a-leash status quo?