Solid Jello
["3 (3 oz.) pkg. Jell-O", "1 box (4 envelopes) Knox unflavored gelatine", "4 c. boiling water"]
["Mix until dissolved and pour into a 13 x 9-inch pan until cool.", "Cut in 2-inch squares.", "Add fruit, if desired."]
["Jell-O", "unflavored gelatine", "boiling water"]