There are many different types of paint that many use when they are going to follow any sort of artistic endeavor. There are water paints, pastels, and many other types of water based paints. There are some that will only use oil paint, and they do that because they like the way it looks and the way it mixes. Each is a personal choice of the artist, but most at least try oil at one time or another. If you have a child interested in painting, they are going to want to try it as well.
If you have a child trying out oil paint for the first time, take some precautions. Oil paint is not washable, and you might have to have strong chemicals to remove it from any part of your home. You want to set up an area where the child can paint that is safer than other areas of your home. Lying down cloth can help, but that does not always save a carpet. If you have a spare room that you can offer and clear out, that might be the best way to go.
When buying oil paint for this type of craft, remember that though it might seem expensive, a little goes a long way, and many like to mix their own colors. You may not have to buy the entire rainbow of oil paint colors you see in the store. You can also buy them in sets, but do make sure you buy quality paint for your child or they may become frustrated and give up. If they have a love of painting they will paint with just about anything, but there is no sense in discouraging them. Artistic hobbies often brings great amounts of joy throughout a life time to those who do them.
If buying oil paint for your child for the first time, you should definitely set up some rules. They should be told where they can paint and where they can not. Telling them only on paper or canvas is smart. Also show them how to open them and close them up tight. Though oil paint does not dry out as quickly as water-based, it can happen. A tube that is not properly closed and put away is an accident just waiting to happen anyway. If you have other children in the house, it is essential they are put away properly. You might want to handle that on your own.