If you are looking for an easy to use camera that anyone can use, I suggest buying a point and shoot (PnS) camera. I've personally used PnS, Bridge cameras and DSLRs in the past, and safely say that for regular everyday use there's nothing that beats a PnS.
It is very easy to carry, requires no maintenance and is pretty inexpensive as well. Regarding preference for Canon and Nikon, I suggest none. Canon and Nikon are extremely good brands and make very good DSLRs. However, I've found out, with my experience, that Sony makes some of the best point and shoot cameras. I'm not saying that Canon/Nikon do not make good PnS cameras, but Sony cameras are the most easy to use for all genres of people.
Since, you've not mentioned your budget, I will not be able to give you any model numbers to check out. An advantage of buying on the internet is the availability of deals and discounts. However, make sure you buy from a reputed online retailer like Flipkart and Amazon.