Think of a triage trolley where everything you need to transport your medical gear, then layout and use your equipment in case of an emergency, is all included in the 3 in 1 Doctor Trolley Set. Plastic case expands from 23.5 x 6.25 x 16.5 inch tall to 18.5 x 17 x 23.5 inch tall. Parental help needed to transform from one use to the other.