Click on the green flag to water your plants. If the cup does not start sitting straight up, you can click on it to turn it upright.
I had a lot of fun making this project! Using the "send message" blocks has always been fun! My biggest challenge is when I started adding sounds, somehow my messages and change of costumes got mixed up and the plants were full grown even before I started watering them. It took quite a while to debug the program. That's what took the most time!