Hi Jeannette,
I am kind of in the same boat as you are, only my kids are 19, 15, and 12.
But, I have dabbled in still photography my whole life, just haven't done much with it. I am in the videography business and the only still photos I do are for websites and real estate appraisals (my other business that acutally makes money - or used to!

)
Anyway, I went to your website. Very nice! Here are my opinions.
I love the children photos. You can really tell that this is your passion. Nice! Did you retouch them in photoshop; I don't know how you can get those warm colors just by not using a flash.
The fireworks photos - mine look the same way. Kind of cool, graphics wise, but really doesn't capture the true, awesome, beauty of live firewords. I really don't know what to do with that. Maybe some of the pros can chime in.
I love the nature photos. Awesome!
The flower photos - beautiful! However, I think they all would look much nicer with the background blurred. Here again, don't know how to do it, just know it looks cool.
Hawaii - I have the same problem with beach scenes here in Clearwater! White sand, gray water, blazing sun! They all look washed out. Even the birds on the beach are grey! What to do? Have no clue!
So, I hope we both can learn lots and have fun doing it. After all, if it's not fun, why do it?
Great job!