Cheryl can't leave Ruby alone on her first week at kindergarten. Jim says it'...
According to Jim
Season 1 Episode 21: Cheryl's Day Off
Cheryl has a day of errands and time with her friends. Jim has to watch the children, but when he has a chance to have the kids go to a friend's home, he readily drops the kids off. When Cheryl returns, he forgets where the kids are at.