If the dimensions of the room allow it, you can divided the space so that each child can have their own corner.
In most modern apartments, however, this is not possible. In this case the answer comes with the form of a compo.
"Stuva" , the loft bed of Ikea, offers space for sleeping, reading, storage, play and relaxation, in only 2 square meters.
Bed base included. The ladder can be attached only to the right side of the bed. Bunk beds or loft beds are not suitable for children under 6 years of age, as there is a risk of falling and injury. The mattress should have a maximum total thickness of 20 cm, so as not to exceed the mark on the top of the ladder. It is important not to screw hooks or handles on the bed, or hang ropes or belts so that children are not caught while playing. Minimum required ceiling height: 244 cm.
Height: 182 cm
Bed width: 99 cm
Bed length: 207 cm
Mattress length: 200 cm
Mattress width: 90 cm