I pondered over this one week for a long time. My company had offered me a place on a one week course, fully paid and relevant to the work I was doing.
There were so many advantages of going: A change of scenery, a chance to catch up with work colleagues, a full weeks wages and possibly a new avenue for me to explore while working part time.
The main disadvantage of course is that I would need to find full time childcare for C for the whole week.