Yes. Also, once is enough.
Most poskim say that kavana is not necessary for keilem. Therefore, if it fell in it is kosher and a brocho on it is now impossible.
There are those who are machmir that one should redo if done without kavana ( ba'ch and gra).
Ramo says that even a young child (supervised) with no kavana can do it, seems that he holds no kavana is fine lechatchila.