I've just got a place on the access course after having done an HNC & HND in Biomedical Science and will be applying for 2013 entry. I have 3 children, 2, 7 and 10. The 7 year old also has cerebral palsy and kidney disease (no dialysis thankfully).
It's hard and I am constantly juggling things and hoping that the 7 year doesn't take a bad turn, especially when I have an exam or important lecture the next day. Then you have everything that you would need to do at home like tidying up, washing and ironing, getting car insurance quotes, doing the shopping, making meals that are reasonably healthy, spending time with the kids, giving your other half a bit of attention so he/she doesn't take the huff and helping your dear aunt/granny/mother/dog etc.
I wouldn't have it any other way though, I love it.