Try to make sure your Quaker gets a bath at least twice a week. Only do this when your parent is around though, in case an emergency happens and your bird needs extra help. Your bird can take a bath in just a very little bit of room temperature water in a shallow pan or clean bathroom sink with no soap. Never, ever leave your bird alone around water, including the toilet, because wet feathers don't fly at all and birds can't swim, so birds drown very, very easily. This is one of the main accidents that kids Quakers die from every year.
Quakers are very smart.
So this means that your Quaker will have feelings and understand lots of things just like you do. Never let anyone pester or tease your bird, like banging the bars of their cage or sticking their fingers at them. Never, ever hit, thump, or drop your bird. They are very little and you could kill them. Plus, they will remember it and won't trust you anymore, which means they are more likely to bite you or act stubborn the next time.