idea 1 Inspired by the grocery shopping carts of retired Chinese seniors. When you walk in the market you just pull it like a suitcase. The inside of the cart can be folded to form a table, so you can stop and sell. idea 2 Transferring the weight of the food to the head to the ground. Wheels on the bottom assist the elderly in walking. When you need to make a sale, just use the retractable structure to put the food down. idea 3 Modeled after the structural principles of the ancient Chinese arch. Like a teeter-totter, it transfers the force from the shoulders to the ground.