LEGO Building Challenge: Machines + Paper. How to build a working LEGO paper crimper and a machine that draws circles. Great STEM challenge!
Simple Kids Science - How Yeast Works
Different types of chocolate chip cookies + ted talks & science of cookie
Toddler Science: Celery Experiment, Learn about Plants and How They Absorb Water in This Science Project for Kids
How to make your own bubble blower #shareacoke
A fun engineering project!
batman activity science literacy
4 Engineering Challenges for Kids - Mrs. J's notes: Low-cost, low-tech makerspace supplies with challenge ideas. Would be great for elementary students, especially K-3
Computer Coding Game No Computer Needed Superhero Activity - teaching kids about coding offline
A Q-tip Maze! Fun rainy day STEM activity for kids. Could build it and then have a partner find the solution.