My ex-husband and I have been divorced for 3 1/2yrs, at the time of the divorce our children were 3 & 5yrs. They had not enetered in school (of course at that age) yet, when the child support was determined. The kids are 8 1/2 & 7yrs old. They of course have back to school clothes that are needed, lunch at school to pay for and they also want to get into after school activities, which I cannot afford alone. I have asked their dad to perhaps pay for one activity and I pay for the other, he said no. My current husband and I have our kids full time with him seeing them every 2 months, which he wanted. I have never gone back to get a increase, although he makes $5-$6 more an hour than he did when everything was final 3 1/2 yrs ago. What are my rights with this matter OR do I leave well enough alone?