When people decide it's better for children to be away from their parents for a while it's known as living in care.
There are about 70,000 children living in care in the UK - that might sound like a lot but it's actually less than 1% of all the kids in the country. The average age of a child in care is 10 years old.
Most children in care are fostered, which means they live with another family for a while.
Sometimes they stay there for just a weekend, other times they can stay for years.
Others live in children's homes, which is a bit like living in a big house with lots of other kids - like Tracy Beaker living at the Dumping Ground - only staff look after you instead of parents.