YouTube Kids Great for Kids 10 and under- Free App

App:  You Tube Kids
Cost:  Free for iOS and Android

Age appropriate videos

Level- Pre K -3rd grade

Finally, youtube has created a safe place for kids to explore.  All videos are kid appropriate.  It has a link to tv shows for kids, a kids radio and an educational/learning link.  This will put parents minds at ease know their kids won't be coming across inappropriate videos.  This is also a great because it gives the parents the option to set a timer on how long children can use the app.