High school science teacher Bruce Yeany says, "Here are a few more example of balancing toys that are made with simple materials. Making these types of toys have been especially popular with students. Toys can be a great lead in to the study of center of mass, center of gravity, levers, torque. Also makes a good STEM challenge for students to come up with their own balancing toys and investigate factors that influence its behavior."
Here's Bruce's first video about making balancing toys: