it was a good idea and thesameboat often has good ones, but I might be giving credit incorrectly... anyway, it went something like "you know sweetie, that is a really good question, and lots of people have different thoughts on this (could be death, G-D, afterlife, whatever), but no one is really certain of the answer, but in our family, we believe______, what do you think?" This might be too advanced for a 2 year old, but it should give you some thoughts anyway.
I read a children's Noah's Ark book to my (4 YO) DS and he wondered who the people on th last page were (they were Noah's family), but DS though they were G-D. I explained that G-d cannot be seen, or heard, but that he is always around us, to which DS asked, so is he invisible? Hmmmm, I said, yes I guess he is... to which DS promptly punched the air and then giggled and laughed to his hearts content....Oh brother! What am I in for