Starfall is a great website for children. Their focus is on younger children from Pre-K to the 3rd grade. A variety of well thought out games that teach children the ABC’s, math, reading, and just about everything else needed for a growing brain.
This is another favorite website of my younger students. They love all of the games and can follow along with the included audio help. I routinely use this website to reinforce the alphabet for my Pre-K and Kindergartener students.
NOTE: If you are using a mobile device, this website will want to charge you for access.