The butterfly life cycle

Noah's fascination with butterflies continues so I purchased some plastic toys and three caterpillars at Kidspace (my school was there on a fieldtrip). When I came back home, Noah was really into it. I tried to get him to name the caterpillars and he chose the name "Caterpillar" for all three! Here he is explaining the life cycle... will he be a lepidopterologist when he gets older???