I just want to thank you so very much for a wonderful website. Love, Love, LOVE IT! There are soo many great ideas for games that many of them are on my calendar. Who would of thought that the greatest people with the best ideas are on this website. I'm so grateful to have stumbled upon it.
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I think you could add a bit of potting mix and plant some seeds in them.
Maybe make it a bit of a competition between residents.
Good luck.