One day, a girl named Sue and her friend, Tom, were playing with chalk outside. They drew cool pictures on the ground. They drew a big sun, a house, and a cat. They were having a lot of fun.
Then, Sue had an idea. "Let's bury the chalk and see if we can find it later!" she said. Tom liked the idea, so they dug a small hole and put the chalk in it. They covered the hole with dirt and went to play other games.
Later, they came back to find the chalk. When they dug up the hole, they found a big, shiny rock instead of the chalk! They were very surprised. They took the rock home and showed it to their parents. The parents said it was a special rock called a gem. Sue and Tom were happy with their new treasure.
