"The answer to your riddle is a human being," you say uncertainly. "Of course", the Sphinx exclaims. Now her expression and tone of voice change from angry to friendly. "When you are a baby, you crawl on all fours. As an adult, you walk on two legs. But when you are old, you have to walk with a cane." The Sphinx pauses for a while. Then she speaks again.
"You see, I only allow the wisest of travelers to enter my domain. Fools have no place here. You have proven yourself worthy of this," she says. Suddenly, something forces your eyes shut. You cannot open them no matter how hard you try. Then, thirty seconds later, the grip is released. You open your eyes to see a music box in front of you. "This music box plays two tunes," explains the Sphinx. "That switch on the side of the box controls which tune. Now, whenever you are here in the Land of Legend, and want to go home, flip the switch so that the arrow points to the tiny picture of yourself, and then press the button to play the Tune of Home. Whenever you are in your own world and want to go to the Land of Legend, flip the switch so the arrow points to the tiny picture of me, then press the button to play the Tune of Legend. You are always welcome, both here in the Land of Legend, and in the Forest of the Sphinx."

The End