At Halloween, you may hear children saying phrases such as "Trick or treat!", "Boo!", or "Happy Halloween!". You may also hear them saying things like "What a spooky night!", "I can't wait to dress up!", or "Let's go get some candy!".
Children would likely say "Trick or treat!" or "I want candy!" during Halloween. These phrases are often used as a polite demand for receiving candy while going door-to-door on Halloween night. Additionally, they may say "Boo!" or "I'm a ghost!" when dressed up in spooky costumes. These phrases are synonymous with Halloween and are often heard during the festivities by children.