Contains at least 12 small worms and enough food to grow them to 3-4" in less than a week. The reason we choose to send small worms is to provide the customer with a fresh cup and the ability to grow them to the size they want, as quick or slow as desired. If you would like them to grow fast, keep them 80+ degrees, 72 for normal growth, or 50 for slow growth. The habitat provided is a fully functioning enclosure for hornworms. After receiving your hornworms, place the cup with the lid facing down. The hornworms will crawl up the screen to the food and the feces will drop to the lid for easy cleaning. Make sure to provide air flow to the lid for adequate ventilation.