Dreams involving children can symbolize innocence, new beginnings, or responsibilities in your waking life. Cleaning the kids' bums while they are standing in a toilet bowl may suggest that you are dealing with messy situations or responsibilities that feel overwhelming. The toilet bowl could represent feelings of discomfort or the need to cleanse a situation in your life.
This dream might indicate that you are trying to help others (the children) while managing your own feelings of discomfort or chaos. It could also reflect your desire to take care of or nurture those around you, even in challenging or uncomfortable situations.
Consider reflecting on your current responsibilities and whether there are aspects of your life that feel messy or in need of attention. It might be a good time to address those issues or find ways to simplify your obligations.