Located at the seat of the institute at Sojerjeva 9 in Ljubljana it houses two groups of children from one to six years of age (maximum 38 children).  The unit Oranžna hiša otrok Dravlje (Orange Children’s house) at Bravničarjeva 8, Ljubljana, also houses two groups of children from one to six years of age (maximum of 33 children). The third unit in Podutik (Ul. F. Kozaka 49) also houses two groups of children from one to six years of age (maximum of 38 children).

Preschool has the all-day Montessori program and has been noted in the state register of preschool units on 29th October 2008 under the number 140. It was upgraded on the 22nd of August 2012 by noting the second unit of the Montessori inštitut.

The Ministry of Education and Sport cast a decision that Hiša otrok Dravlje fulfills all requirements for program co-financing from public resources (the municipality contributes 85 % of their contribution for the child enrolled in the public preschool at the municipality of the child’s residence).