If one is in the middle of shemoneh esrei, and hears a kaddish being said, he should stop and listen to ‘amein; yehei shemei…’.
While answering yehei shemei …, it is improper and inappropriate to fold up one’s tallis or put away one’s Tefilin; rather, one must focus and concentrate.
See the bulletin this week for an announcement of a contest for kids in Hilchos Beis HaKnesses. Maybe us adults should join in—????