One day, Tim went to ride his bike. He saw that the chain was broken. He felt sad. Tim wanted to replace the chain. So, he went to his friend, Sam.
Tim said, "Sam, can you help me? My bike chain is broken. I need to replace it." Sam said, "Sure, I can help you. But you must be careful, not careless."
Tim and Sam went to the store. They bought a new chain. They were so happy. But on the way back, Tim was careless. He did not look where he was going. He tripped and fell. The new chain broke.
Tim cried. He said, "I was careless. Now my new chain is broken too." Sam said, "Yes, you were careless. Now we cannot ride bikes today."
Tim learned that he should not be careless. He had a bad day. He wished he had been more careful with the new chain.
