Simplify the following text for a Grade 3 native English-speaking person.
Original: The high five is a celebratory hand gesture that occurs when two people simultaneously raise one hand , about head high , and push , slide or slap the flat of their palm and hand against the palm and flat hand of their partner . The gesture is often preceded verbally by the phrase `` Give me five '' or `` High five '' .
Simplified: A high five is a hand gesture done with two people .