Add tea bags to boiling water and let steep according to package directions (maybe a little longer). Sweeten with honey if desired.
Combine brewed green tea and sparkling water in a large pitcher. (Add simple syrup to sweeten if desired).
Add sliced lemons and strawberries.
Add blueberry cubes after pouring into glasses if desired (simply blend 1 cup frozen berries + 1 cup water and freeze in ice cube trays).