Children in the classroom watch a caterpillar grow, disappear inside a shell it makes, and come out of the shell a beautiful butterfly. Interest Level: K-3 Reading Level: 2.8 ATOS Book Level: 2.9 AR Interest Level: LG AR Points: .5 AR Quiz: 18870EN Reading Counts Level: 2.8 Reading Counts Points: 2 Lexile Measure: 490 Lexile Code: AD (Adult Directed) Recommended for use in science lessons by NSTA.