The largest user group for humidifiers is children under the age of 6, because many of them have allergies. I wanted the child to be involved in the filing of the humidifier and also help them to understand that humidifiers work by releasing water into the air.
In this design, filling a humidifier become a bedtime ritual. The child would wheel the humidifier to the tub, the parent would fill it, and then the child would wheel it back their bedside, step up, and climb in!