I agree that anecdotal evidence is worthless. However, there have been a number of studies on this and they've found that toy preference is pretty innate. And

I agree that anecdotal evidence is worthless. However, there have been a number of studies on this and they've found that toy preference is pretty innate. And even present in other primates. See this paper: http://www.scribd.com/full/36579212?access_key=key-1ztjrngs92zr5fszbpve http://www.scribd.com/full/36579212?access_key=key-1ztjrngs9...