Do your sanity a favor a DON'T let your kids watch this show. It's trash. Obnoxious, repetitive, boring, ugly animations. The moral is essentially the same every time, but the execution is so poor that it actually shows kids several problematic behaviors along the way. I cannot stress enough how annoying this show is! Worse than Paw Patrol and Super Wings.
Alternate recommendations: True and the Rainbow Kingdom (for littles), Octonauts, Dinotrux (some may find this too violent, so preview first)