In this order you will receive 10 baby caterpillars, when i do have extra you will more than likely receive a few extra i add enough milkweed for the overnight trip. Please have both nectar plants and milkweed plants available when you recommend these guys as they can eat a lot of food they will only eat milkweed nectar plants are for adult butterflies. It only takes four days for an egg to hatch so with as many butterflies as i raise i have many hatching on a daily basis. Please if you need any help with raising don't hesitate to let me know asap i will get back to you as soon as i can. These are great for schools, kids, families, and even adults to raise.