One time a talmid came to Rav Nosson Tzvi For a Brocho, with his 6 year old. The 6 year old asked the Rosh Yeshiva for a brocha. The rosh yeshiva gave the child a bracha, The Rosh Yeshiva then turned to the child and said, now it your turn to give me a brocha. The boy was too embarassed, but after a while he agreed. The boy turned too the Rosh Yeshiva and said, “the Rosh Yeshiva should grow up to be a big talmid chacham. The rosh yeshiva had a smile on his face the rest of that day.