A net is like a flat pattern for making a 3D shape. It's like a puzzle that you cut out and fold together to make a solid object. Think of it like folding paper to make a paper airplane. A polyhedron is a fancy word for a 3D shape that has flat surfaces and straight edges. So, a net for a polyhedron is a flat pattern that, when folded up, makes a 3D shape with flat faces and straight edges. It's like a recipe that tells you how to make a cake, but instead of flour and sugar, you have paper and scissors. So, if you follow the instructions and put it together correctly, you'll end up with a cool 3D shape that you can hold in your hands.