Your pic here reminds me of when I was 10 or 11, my mom got 6 fertile eggs and built an incubator out of an old fish tank with a light bulb. She marked an "X" on one side, like I see you did, and turned them every day. We watched every day for 21 days waiting for them to hatch. It was so cool to watch. When they were big enough to go outside she built a pen out of old screen doors. Then came the day when we came home from school and the chickens were gone. Neighbors were complaining about the roosters crowing so mom had them butchered. Kinda sad but the memory has been with me for 50 years. Now it' my turn!