The price is based on the small size. 3 size is optional. if need other size, contact us anytime. If you are looking for gift ideas, then the sensory tubes may be your best choice. Perfect as your birthday gift, goodie bag stuffers,party favors,christmas gifts for kids or even a classroom reward. You can also give these party favors, sensory toys for toddlers,also a perfect gift for children with developmental delays or children with special needs.