PBS Kids is the educational children's programming brand of Public Broadcasting System. It started in 1999. Its programming is non-commercial, like all PBS programming. PBS Kids programs are mostly shown in the daytime. These programs are meant for children ages 3–10. PBS Kids's programs use science, math and reading. Some of them also include social studies. All of the programs give a problem that the children have to solve. An example of these problems would be what to do when two children want to play with the same thing but fight (teaching the importance of sharing).