bar_buff:
is it innovative? It already exists. Again I'm not really trying to heat or cool actual stuff but to simulate it can work.
Now I've no idea what you're asking for. The idea of a heater+cooler was your idea - that's what we've been asked to propose innovative solutions for. A Peltier is relatively obscure and not at all obvious for this application. If that's not innovative enough then what aspect of the project is it that you want to demonstrate and what are your criteria for it being innovative? You could implement a temp sensor and micro LCD temperature readout with a mock 'heating' and 'cooling' display if you want - is that the sort of thing you're after?