Some great websites:
http://www.nickjr.com
https://pbskids.org
https://www.sesamestreet.org
To help release all that energy with physical exercise like a dance party or yoga:
Go Noodle: https://www.gonoodle.com
The Learning Station: https://www.learningstationmusic.com
The Singing Walrus: http://thesingingwalrus.com
Cosmic kids yoga on youtube: https://www.youtube.com/user/CosmicKidsYoga