Kids placed long term still leave eventually. I grew up with foster kids, and loved it. BUT it is hard. One of my foster brothers was just 6 months younger than me and lived with us from when we were 2 ish to when we were 7 years. And then he was moved on. For me, as a 7 year old kid he was my brother, i couldn't remember before he was there and then he was going somewhere else and we couldn;t see him again. that was hard to understand.