What is heaven?

So last week Brady and I are coming up the steps to our front door and he looks at me and says: "Mommy, what is heaven?" A thousand thoughts go through my mind in a matter of seconds. Me: "Heaven is where people go when they die." (Did I just mention "die" to my 2 1/2 year old?) Brady is looking at me...Me: "People that love Jesus and believe in Him go to heaven when they die." Brady: "I don't want to go to heaven right now Mommy." Me: "Okay, buddy we don't have to worry about that right now." WOW!