带 (dài, to bring/carry) vs 戴 (dài, to wear accessories). Same pronunciation, different characters: 带东西 (bring things), 戴帽子 (wear a hat). In practice, many people use 带 for both.
grammar
带 is versatile: 带东西 (bring things), 带孩子 (bring/take kids), 带路 (lead the way).