Misschien een idee?
https://www.google.com/search?q=letterbak+action&client=firefox-b&tbm=isch&source=iu&ictx=1&fir=-Plhk71V_jXbCM%253A%252CJH1m1Y6SByXKHM%252C_&usg=AI4_-kQ3r7LAr5SmLTiAr4VdU0yh5SLOqQ&sa=X&ved=2ahUKEwjHu5G4i4TfAhUQLFAKHcCsCq8Q9QEwBHoECAQQDA#imgrc=-Plhk71V_jXbCM: