The Butterfly Effect: Sarah, a shy girl, accidentally knocked over David’s carefully built sandcastle at the beach. Dejected, David was on the verge of tears. Sarah, filled with remorse, gathered colorful pebbles and seashells, painstakingly decorating the remains of the sandcastle. When David saw his “upgraded” creation, a smile bloomed on his face. This small act of kindness became the beginning of a beautiful friendship.