“What initially walks on four legs, then on two legs, and finally on three legs?” the wizard asked.

“It’s a human being: When it is a baby, it crawls on all fours, later, it walks on two legs, and finally, in old age, it walks with a walking stick,” Tim said.

“Correct,” the wizard said. The wizard cast a spell, and a treasure chest appeared.

Tim opened the treasure chest and saw it was full of gold.

Then the wizard disappeared.