For me i believe there is no business out there that is not lucrative, it is only a matter of finding the right target audience. Selling of toys is very lucrative, you just need to find the right location with your target audience and as well proper packaging.
Well, the lucrativeness of a business depends on the demand of the product. This is why certain kinds of businesses are more common and profitable as compare to others. So, before starting any kind of business, the demand of the product should be analysed.