Great! Thanks! Do you know what the min amount of £ you need to have in the bank is?
There is no minimum amount.
You just have to show that:
a) The visa holder has not claimed or accessed any public funds in the 2 years
and
b) You have been and can continue to support yourselves without accessing public funds in the future.
Essentially, you want to show that you meet the same financial requirement as you did for your spousal visa:
That you have at least as much left over each week after rent and council tax (but before any other expenses) as a UK couple on income support would receive from the government.
For April 2013/April 2014, this amount is £112.55 for the couple plus £65.62 per child per week. In April 2014, it's increasing to £113.70 per couple and £66.33 per child - so just depends when you apply as to which amounts you need to show.