2 years and up. Show children the life cycle of a butterfly with this Specimen Life Cycle Puzzle. Each piece features an authentic specimen that depicts a life stage. Children must correctly connect the pieces to one another to see the butterfly's life cycle from start to finish. As children assemble the puzzle, they will engage in early scientific exploration that can help create a lifelong love of nature. Largest piece measures 2.1"W x 1"H x 2.4"D; smallest piece measures 1.25"W x .6"H x 1.4"D.