My 3 year old has had pale/light colored stool for 3 days, watery to very loose. No recent diet change; still active; no fever; no other symptoms?

Toddler' diarrhea. This is most like a harmless process called toddler's diarrhea. There are frequently several watery stools per day with frequent bits of undigested food. If the pale color persists, or the condition worsens, you will want to have your child checked by a primary care provider.