Make your first prototype for less than you think

Your first prototype only needs to answer one question: does the main idea work? Cardboard, foam, tape and parts from the hardware store are fine.

List every part and its price before you buy. Vault Forge builds this parts list with quantities and costs for you, and adds up the total.

Test one change at a time and write down what happened. Only move to 3D printing or a professional prototype shop when the rough version works.