First, mix the casting powder with water and pour the mixture into the silicone molds. Follow the manufacturer's instructions. Allow it to harden thoroughly.
Once the casting powder has fully hardened, remove the houses from the mold. If necessary, sand them down a little with sandpaper.
Before using the marker for the first time, shake it with the cap closed for 60 seconds. Then, gently press the tip onto a piece of paper several times to activate the ink flow. Once the tip is fully saturated with ink, write on a test piece of paper.
Then, use the YONO marker to decorate the house fronts as desired.
Finally, paint the roofs and add an interior light source (e.g., a string of small fairy lights or LED tea lights).
To ensure even ink application, regularly pump the YONO markers.