About the idea of group assignment

After the frame prototype has been found in the internet, I begin to find some new ideas for interaction design prototype, because it is a design, so I have to think some new ideas.
One of my idea is to build a machine hand! It can be put on user’s hands, and they can control the hands of screen, they can use telephone calls, play sports, shopping, it’s just like a real world in the screen, users can enter into the world without going outdoors. The objective is to let users just stay at home and feel the outside world, it’s very convenient and humanistic, for example, if users want to buy a cell phone, they can just simply use the machine hands move to the cell shops, and there will be lots of cell phones on the counter, they can choose one they like by hands, and also can test it like test buttons, making a phone call… the things in the screen is just like a real world.
I have made a sketch of how machine hands work, I’ll upload it after I take photo of it.
This idea is very creative I think, but there must be many problems in implement, so finally I cancel the idea. After that, I made a new idea: automatic wheel chair, it means there is a console which had many buttons, one of them called RECORD, which can record the path of the wheel chair, this is very convient in real world, because many people need it, they needn’t use their hands to make the chair move. But the problem is as Gaby said, it’s very hard in the protyping, should we just let one person sit on the chair and demonstrating? This is reasonable, we don’t have consoles, and we can not let the chair move automatic.
So finally we decided to continue our plan, which is photo frame, but more powerful, more creative. Our new photo frame include such functions: Wireless enabled( can access to wireless internet), Receive videos, images, messages.(By simply steps), Screen touch enabled(Clear and easy), IP video phone(Which is free and fast, also including video chat), SolarPanel & Power backup(more than one choice for charging), the objective is for old people to use to contact with their children which maybe outside for working or studying, this control panel is very easy to use, and I have made the sketch of it, I’ll upload it which will make my idea clearer.