The set contains temporary tattoos that allow children to remember where they have previously injected the insulin, and an insulin pen designed specifically for a child’s hand. Thomy’s temporary tattoos visually indicate where the child has previously injected. These tattoos function by using an overall design language: the black ink stays on the body, and the colored dot is removed with an alcohol pad before each injection, ensuring that the patient disinfects the area. After a couple of days, the tattoo will no longer have color, indicating it’s time to choose another design and rotate to another injection site. Thomy’s second component is a non-disposable insulin pen that is easy to grasp and control by a child. The shape is fun and versatile, allowing users to grab it in different ways. It is compatible with standard 3ml insulin cartridges and pen needles. The pen’s release dial is covered in thermochromic plastic.