After you have visited the Community Center, found the golden scroll, and are given the means to translate it by Wizard, you can unlock this bundle along with a few others. During Summer forage for Spice Berry, Grapes, and Sweet Pea. Go into the Community Center and go to the scroll and drop the items in the boxes. The reward is 30 Summer Seeds. A little creature can be seen carrying away your gift after you donate the items.