Simplify the following text for a Grade 4 native English-speaking person.
Original: CupuaÃ u trees usually range from 5 to 15 meters ( 16 to 50 feet ) in height , though some can reach 20 meters ( 65 feet ) .
Simplified: CupuaÃ u trees usually are between 5 and 15 meters ( 16 to 50 feet ) tall . Some trees can reach 20 meters ( 65 feet ) .