I wanna take my children... who much is it 4 children and 2 aduls... my kid are age 1y 3y I have a 7 y and a 11

The answer is - it depends. Pricing varies on how many days you buy, if you get single-park or tickets that allow seeing both parks in one day, etc. But you can see all the info here: https://www.universalorlando.com/web/en/us/tickets-packages/park-tickets/index.html

Check Universal's official website. There you can get exact prices.