Yes! This is the perfect time! I would not try to hide this event.
Rather, talk to him (at his age level) and explain to him what has happened. I know he may be sad or cry for a while, but I truly feel that children have a harder time if we try to keep certain basic emotional things from them. There are plenty of sites that go over the basics if you need a little guidance on the subject.
associatedcontent.com/article/21643/teac... This link is specific to teaching children death through the loss of a pet. softhearted.wordpress.com/2009/07/10/tea... Good luck!
He's three years old and innocent. He has plenty of time later in his life to learn about loss and sadness. Don't be in such a rush to bring that into his life.
Just get a new goldfish.
Let him lead the conversation, and answer the questions he asks. You want to be careful not to overwhelm him with your feelings ad emotions about death. Explain that the goldfish has died, and he won't be able to see him anymore, and then take it from there.
If he chooses not to engage, bring it up a again in a few days - you'll eventually have the conversation when he's ready.
I also have a 3 yr old. I would and have told him, that for death they had to go away for a while and maybe we will see them again. I also told him that it's ok to be sad and miss them, also it's ok to cry when you are sad.
Most likely he will remember the goldfish in spurts but not enough to make permanent damage.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.