Hi Speedy,
I had a miscarriage two years ago, and I'm so sorry to hear about your loss.
Like Marina, I had a lot of people make comments intended to help, but just didn't.
When it comes to heaven, I've always struggled with many ideas i.e. that there won't be a sea or marriage ect ect. or similar things that I enjoy here in this realm.
But I've gotten to a point to accept what I call my "better than..." theory. i.e. If I won't be married to my husband in heaven, I trust God's promises and know that my relationship there will be 'better than' what my limited imagination could conceive of here and now.
I'm not sure any of us have an "age" in heaven as we do in this life. If we are talking about ETERNAL life, I'm not sure there will be babies or adults or old people in heaven... if you get what I mean. I think we might just be beings...but more glorious and perfected than we can probably understand within our realm of experience.
The bible does speak about having 'new bodies' (some theologians disagree as to whether this will be immediately in heaven when we die...or at a later time when Christ returns.) The bible speaks of feasting in heaven, and Jesus ate a meal with his disciples AFTER his resurrection- so I like to think I will still be able to order my mocha lattes at the heavenly Starbucks counter... but I trust that if there are no such thing as mocha lattes in heaven that what God has in store for His children will be better than what I could ever hope or imagine.
I'm really bad at providing specific scripture references...sorry!...but there are many versus that speak to how much God loves children.
My vicar's wife, who also lost a baby, said she just read a book called 'Heaven and Hell', and found it very helpful. I'll try and find out the name of the author.