Wonderopolis - http://wonderopolis.org/
Explore answers to fascinating questions and curiosities. Check out the "Wonder of the Day".

The Kids Should See This - https://thekidshouldseethis.com/
Smart videos for curious minds of all ages.

Wow in the World - https://www.npr.org/podcasts/510321/wow-in-the-world
A podcast that guides curious kids and their grown-ups on a journey into the wonders of the world around them. Emphasis is on science and technology.

Time for Kids - https://www.timeforkids.com/
Current events in a kid-friendly format. Choose articles by grade level (K-1, 2, 3-4, or 5-6)

Krazy Dad - https://krazydad.com//
Thousands of free printable Sudoku, logic puzzles, mazes, and more.

Scratch - https://scratch.mit.edu/
Scratch is a block-based visual programming language and online community for kids. Create interactive stories, games, and animation while learning to code.

Byrdseed - https://www.byrdseed.com/
Differentiated lessons, videos, and challenges to get "kids' brains sweating".

Mensa for Kids - https://www.mensaforkids.org/
Lesson plans, games, and resources for gifted kids from the Mensa Foundation.

NASA - https://www.nasa.gov/stem/forstudents/k-4/index.html
STEM lessons and "stuff to make, do, play, or print" for students in grades K-4.