I have three deliveries due today so no dog walk...it will have to be the cross trainer then

My two boys are taking exercise to the extreme - they have decided to walk to school this week which takes them an hour. It has been OK up till now as it has been sunny, today it is raining and they still wanted to walk. I dread to think what state they will be in when they arrive. They have at least worn coats which is a minor miracle! I did offer them a lift but they wanted to walk and I have to say I was impressed even if I do think they are mad