Giantmicrobes Themed Gift Boxes - Let's Get It On If you're tryin' to hold back your feelings and if you feel like I feel, then understand me, you've got to be here sugar. If you're in the mood for education about life's origins, then hold on to this exciting themed box collection and Let's Get It On. Includes these 5 mini microbes: Egg Cell, Sperm Cell, Stem Cell, Zygote, DNA. Each mini microbe measures 2-4 inches.