The ultimate collection of DIY activities to do with your kids to teach STEM basics and beyond, from a wildly popular online dad. With more than 3 million fans,

Through a series of unique experiments, young readers can discover the different types of energy and how energy can be changed; includes ideas for science fair

Presents nine experiments that help demonstrate the properties of matter, focusing on how solids, liquids, and gases differ and how they change with temperature

Directions for many simple physics experiments, including descriptions of necessary equipment, principles, techniques and safety precautions.