A nearly universal feature of childhood is an attraction to crawly, wiggly little creatures--and to anything labeled "mutant." We took advantage of this attraction to entice children to think about science and genetics at a recent "Math and Science FunFest" held at the Tucson Convention Center. We exhibited wild-type and five different C. elegans mutant strains to approximately five thousand grade K-12 students and their teachers over a three-day period. The mutants we showed were "dumpys" (
dpy-5), "rollers" (
rol-6), "twitchers" (
unc-22), "kinkers" (
unc-13), and "longs" (
lon-2). We also showed "glow in the dark" worms expressing
unc-25::GFP in the nervous system using a fluorescent stereoscope linked to a color video system. The wide range in ages of the students presented challenges, but also brought many rewards as we watched light bulbs click on at different levels in the minds of the children. Our "take home" messages varied for each age group, but included the following:*There are living worlds right in our back yards that we rarely even think about. *Studying biology is a fun and interesting way to earn a living. *Genes tell organisms how to work, and when genes have mistakes, things can go awry. *Even tiny worms can teach us much about ourselves, because they have organs, tissues, cells, proteins, genes, and life strategies just like our own. *All organisms speak the same language at the level of genes and cells. To illustrate universality in biology we discussed skin collagen (
dpy-5,
rol-6), muscles (
unc-22), nerve cells (
unc-13,
unc-25), and the ability of a jellyfish gene (GFP) to work in a worm (and, as some of the children gleefully extrapolated, to work in humans). To answer the most common "grown-up" question--"How can this research help people?"--we discussed how the discoveries of Noble laureates Brenner, Sulston, and Horvitz, studying cell division patterns in worms, led to an understanding of one of the major mechanisms of cancer in humans.