Back in 1953, it took 27 hours to make one Marshmallow Peep. Now it takes only six minutes.
You have a fox, chicken, and a sack of grain. You must cross the river with only one at a time. If you leave the fox with the chicken, he will eat it. If you leave the chicken with the sack of grain he will eat it. How can you get all three across safety?
Chicken over. Then bring the grain over. Take the chicken back to where the fox is and take the fox to where the grain is. Go back and take the chicken over.