eddyfca
I think what turned my boys on to science was a book from our local library that told the story of the Big Bang in beautiful, colourful paintings, 'personalising' the universe, and at a childs level. Man, the look on their faces when they learned they are made from 'stardust'...
I don't think they really have a clue what that means yet

but they just 'know' that they are connected in a deep and fundamental way to the entirety of the universe - in a way only kids can.
Another was a short book about a boy who meets Einstein when a friend smacks his baseball into Einsteins front yard (at first he thinks the scruffy and kind old man he meets is Einstein's gardener) and goes on to tell the story of Einstein's life from a school boy's perspective. Einstein teaches him about the universe in exchange for an ice cream. What a deal! It's a lovely, touching book.
I'll try to get the titles - but try your library anyway, who knows what treasures they will have.
Try 'The Fabric of the Cosmos' by Brian Greene for yourself, if you haven't already.
And congratulations on being a new Dad - there ain't nothing like it!