Which innovation should I do?

In my Science & Technology class we are creating a survey to find out which of these innovations is best. To see my options I have created three drawings. Please click on the links to see the drawing.
Prototype 1 Video camera on microwave
https://docs.google.com/drawings/d/1Ss2TZM6iwNl7ousOi26IgLn70Jx_BTi6-xklGr22LAU/edit?hl=en_US

Prototype 2 iPod dock with alarm setting to choose from different music
https://docs.google.com/drawings/d/1I6wkAXVahi9ZMDNivLQxWiji5pxtf0I1Rm-yD-MQavc/edit?hl=en_US

Prototype 3 Microwave with volume control
https://docs.google.com/drawings/d/1cXp4YLO0EwG5MRvofwZAuU-FxDQfcU8k5fNhyr9bYRg/edit?hl=en_US

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