Wallpaper paste in powder form
Dollhouse wallpaper paste is made by mixing powder with water.
The powder must be mixed with water to create a suitable paste. You get about 150 ml of cream from one package. Mixing ratio approx. 6 parts water and one part powder. Adjust the mixing ratio as needed depending on the thickness of the wallpaper.
Note, especially with thinner paper wallpapers, it is safest to spread the paste on the wall of the dollhouse (and not the wallpaper itself) so as not to wet the wallpaper too much.
For thick wallpapers, on the other hand, you may need an adhesive for both the wallpaper and the wall, depending on how slippery or porous the wall material is.