Of course there will be legal requirements in making and selling products at home. Generally you will have to adhere to laws regarding making products that are safe and whont blow up in people's faces. You will also have to adhere to laws about claiming your product is one thing when it is another.
Every state or territory is going to have different laws in this area. For instance it is apparently illegal to sell peanuts in Lee County on a Wednesday afternoon.
You will also have to adhere to regulations regarding the industry you are in. For instance there will be safe food prep laws, or even safe material usage laws.