Have student wrinkle up the paper heart (not tearing it) and then try to flatten it out. Discuss how words or actions can harm a heart and take time to heal. Good first week of school activity or for an anti-bullying activity.
These odd little phrases are used to express a sentiment other than their literal meaning. It doesn’t really rain cats and dogs, as the world and his wife knows. I’ve always been fascinated by foreign idioms
Teaching Tolerance - amazing website and (free) magazine. If you are an educator, part of the "hidden curriculum" needs to be an education in tolerance. Teaching Tolerance offers lots of fun, engaging ideas on how to weave this into your curriculum.