I don't have kids but I think they don't sound that bad. You'd have after school with them every day which a lot of parents wouldn't have. Could mean you can go places after school when it's not as busy as well.
You'd still have the whole of Saturday. I think it's better working Sunday than Saturday as places are open later and from the people I work with who have kids and work ruins their Saturday they would rather have Saturday as their free day over Sunday.