OK. Simple explanation here
The light from the sun takes 8 minutes to reach here, for us. For the light, it takes no time at all...
Time is relative, (sadly?) - there's no fixed clock ticking in the universe. If you were to travel at the speed of light, and travel one light minute in distance (about 1/8 of the way to the sun), it would seem to you to have taken no time at all. However, to those of us who watched you, it would seem to have taken a whole minute.
Hope that helps and is a little snappier than what's above