Grow your own bacteria Whether we see them or not, bacteria are found EVERYWHERE! These single-celled organisms can be found on the surfaces of items like keyboards, doorknobs, and toys, and they’re also found living inside, and outside of our bodies! This kit has everything you need to grow your own sample of bacteria taken from a location of your choosing! The agar gel you create has nutrients that create the perfect condition for the bacteria to grow. When placed in a warm environment, the microorganisms from your cotton swab sample will grow into colonies on your petri dish.