Blocks, LEGO, even paper can be used to build to new heights with engineering and building science. Sure, you might not be building a real bridge to cross a river with, or a house to live in, but even simple exercises like stacking blocks can show kids basic physics and engineering ideas.
Building experiments are easy at home. Use any blocks to build towers and bridges and see how high or how far you can go. Or take a look at some of the links below for fun building ideas: