Once upon a time, there was a little boy named Tim. Tim loved to play with his toy cars. Yesterday, he started to build a big tower with his blocks. But he did not finish it.
Today, Tim's friend, Lily, came to play. She saw the tower and was envious. She wanted to build a tower too. So, they both started to build their towers with the blocks.
They worked hard and had fun. At last, they finished their towers. Tim and Lily were happy with their big towers. They played together all day and had a great time.
