Condition - Very Good The item shows wear from consistent use, but it remains in good condition and functions properly. Item may arrive with damaged packaging or be repackaged. It may be marked, have identifying markings on it, or have minor cosmetic damage. It may also be missing some parts/accessories or bundled items.
Learn to Invent: Practical Instruction
First steps in the process of inventing for beginners young and old. This book provides practical instruction and valuable suggestions on the process of inventing simple devices that can have fabulous payoff.
