Do it on ladybugs.I have 2 in a jar at my house.They are very interesting,did u know that the male ladybugs are smaller than the female.O and they go through a whole life cycle.A egg,Larva,Pupa,and finally a ladybug.Larvas can eat up to 50 aphids a day!It also takes 3 weeks for the whole process.Hope i could help!