window birdfeeding house

my room is under the roof and my bed directly by the window. over the window is a small cavity wich is the home of some birds in german they are called Kohlmeise dont know the english name. i realy like atching them from my bed so i decided to build a bird feeder so i can observe them better. im realy forgetful with thins like watering plants so i wanted to have a big window wich shows me how many seeds are left. thats how i got the idea to use my window for that and just printed 3 walls and used the glass as the 4th. i used “UHU alleskleber Kraft” wich is some kind of all purpose glue.
it can be dissolved with acetone to remove it from the glass. the first two attempts glueing the house to the window have not been succesfull but on the third attempt i used a hair dryer to warm up the glas and this worked and has not moved for a month now but is currently still atached by a string to protect people underneath the window. i used magnets ta secure the roof to the walls and used supe