For this achievement you need to collect a produce from one of your piñatas, only a few of the piñatas can actually produce anything, here's a short list detailing the few piñatas that can unlock this achievement and what you need to do for each of them to be able to collect a produce;
• Place a "Honey Hive" in your garden, feed your Buzzlegum a "Daisy Seed" and then send the Buzzlegum into the "Honey Hive", do this and he'll create a jar of honey.
• Place a "Shearing Shed" in your garden, feed your Goobaa a "Sunflower" and then send the Goobaa into the "Shearing Shed", do this and he'll create a ball of yarn.
• Place a "Milking Shed" in your garden, feed your Moozipan a "Sunflower" and then send the Moozipan into the "Milking Shed", do this and he'll create a bottle of milk.
Alternatively you can unlock this achievement by purchasing a produce from the store and placing it in your garden, for example if you buy a jar of honey from the Costalots store and place it in your garden the achievement will unlock!