In this Instructable, I'll to show you how to build many projects that use a simple hydraulic system that kids in elementary school can build. Each step will show you one of four machines that use the same basic mechanism.
Please message me to report broken links. All of these materials are used in my other Instructables for kids, so your purchases can be used across multiple projects.
First thing's first: How to make a hydraulic system
The video gives you an overview of the simplest hydraulic machine - the photos tell you how to build it! I've had kids as young as 1st grade build this project.