Oklahoma Department of Libraries (PK - 6th grade) provides free online resources for kids. Resources are organized by age and area of interest. The Kids Connections site lists additional resources.
Crafting and Art Activities by Happy Hooligans is a popular Canadian blog that features crafts and activities for preschoolers.
US Department of Education Early Childhood Learning Resources includes guidance for parents and families to help them support pre-k learning and development.
PBS Kids Games provides fun, engaging games that foster learning, movement, social-emotional development, collaboration, and creativity.
JumpStart provides free resources and activities appropriate for preschool.
Stream Sesame Street
English: https://www.youtube.com/sesamestreet
Spanish: https://sesamo.com/
PBS Learning for Preschoolers offers lessons, interactives, audio, and websites to foster preschool learning and development.
TeacherVision provides free resources for pre-k in multiple subject areas and for many areas of interest, including art and music.