We sell lowercase/uppercase Words tiles on PlayOsmo.com and through our retailers.
They ship in a stackable storage container.
Note that when you use these tiles, letters in the Words and Words Education apps are displayed in both upper and lower case, as appropriate. (When you use our classic tiles, letters are always displayed in upper case).
Educator Version:
Plastic lowercase/uppercase letter tiles are available for sale as a separate item to educators. Please contact us through this form if interested in purchasing for your classroom.