"taking care/raising a person" iphone app

I am buiding an iphone app that looks like the "pet" applications that you see know. We need to create a person that we need to keep feding and giving attention. What kind of attention we will get into later (no sex) and this person can give us a mail or sms when we forget to feed it or give it attention. the person can be: -an icon -real movies. so depending on what we do we see different movies or icons.