Well thank you for all the helpful info. I have another question.
Someone mentioned about haveing sole custody of my kids.
I do not have sole custody were doing joint and they would be with me 3 months at a time. Do I have to pay seperate for there visa's for one. and 2 I would think that showing them the custody papers on what we were doing would be sufficent yes? Thank you for ur responses they have been very helpful 
I think a letter from your ex would suffice if you're planning on shipping the kiddies back and forth every three months.
(On a side note, how are you planning to do that? It's gonna be expensive and the parent who does the moving usually has to pay for the plane tickets.) If I were you, though, I would definitely call the consulate and ask what you'll need specifically. Don't risk it and just show up with what we say or what you think might be appropriate.
You'll have to pay a fee for each person applying for a visa. So if you have two kids, you'll pay the fee three times--once for you and once for each of them.
Thought of another one lol. If I move to the UK do I have to have savings or does him having a job and proving he can support me enough? ty ty ty ty ty ty agin 
Ideally, they're going to be looking at your new husband's financial status. The best situation would be for him to be employed (with a salary sufficient to support the two of you and your children) and for him to provide an adequate place to live (not necessarily a mansion or one bedroom for each child, but reasonable). If he's not employed, either he or you will need substantial savings (especially considering there are children involved). If he doesn't have adequate accomodation, you'll need a letter from someone (probably his parents or close friends) saying you can live with them.
The point is that you need to prove that you have a stable, secure financial framework set up for you in the UK. That doesn't mean being millionaires, but it does mean a decent job and a decent place to live.
