“Caps! Caps for sale! Fifty cent a cap!” calls the peddler, walking up and down the streets. He balances a huge stack of caps on his head—gray, brown, blue and red – all piled on his own checked cap. One day he stops under a tree to take a nap. When he wakes up, the gray, brown, blue, and red caps have all disappeared! The only one left is his own checked cap. Where on earth can the others be?