Here we go! I can help with this!
Currently, in Towns, you can collect three thing: bugs with you net, flowers with your shovel, and trash with your hands.
Once you have collected 10 whichever item, you can deposit them into the deposit bots. The deposit bots are found in the fountain map that is located in the center of every zip code. There is a biiiiig fountain with 3 robot/trash-can looking things. The deposit bots will then "eat" and tell you exactly what you deposited. Then the items will show up in your inventory.
After that, you can exchange 'x' amount of 'y' items (like exchanging fish with Old Man Logan) for other items from Rina, Moira, and Peyo.
Here's a link to
kaia9's announcement:
http://www.gaiaonline.com/forum/viewtopic.php?t=11225541