Some time ago we planted a sprouting potato into an old popcorn bucket. Today I decided to harvest because the part above the soil had rotten until it wasn’t connected to the new potatoes anymore, so there was no big hope the potatoes would continue to grow (at least I think so, but I don’t know a lot about potatoes). At first I only found some teeny tiny potatoes the size of my thumbnail, but then there were some bigger ones as well! All in all there is no really big result, now we have about the double overall amount of potato as before (the original one was pretty big), maybe nearly triple if you want to be really optimistic. But nevertheless we have small fresh potatoes from our own window sill now! (Technically this isn’t indoor gardening anymore, as we transferred the bucket to the outside window sill after some days.) Autumn wonders.
starfishskies 
Potatoes grown in a popcorn bucket! Sounds like I way for us to have a vegetable “garden” on our apartment balcony. Neat idea! :-)
I’m glad I could give you a little bit of inspiration :) Would love to see pictures if you decide to try urban gardening!