I have a 3.5 yr old and a 2 yr old, with DC3 due in August. As I'm at home with them all day I feel like there are cleaning/sorting/tidying jobs I could be doing so they don't eat into our weekends (I WFH evenings so can't really do anything then), however in reality every time I try to get a job done they seem to make more mess than there was in the first place or I have to abandon it halfway through. 
Am I missing something here?? Ideas for tasks I can actually do whilst they're around much appreciated. Obv I can't use harsh cleaning chemicals but guess I could swap to natural alternatives ..