If the number of adult men involved in the cleaning process was 30% of the community members, there were 30/100*2000 = <<30/100*2000=600>>600 adult men at the event.
There were also twice as many adult women as adult men in the event, a total of 2*600 = <<2*600=1200>>1200 women.
The total number of adults in the event was 1200+600= <<1200+600=1800>>1800
If the rest of the people at the cleaning event were children, there were 2000-1800 = <<2000-1800=200>>200 children at the event.
#### 200