One day, a little boy named Tim found a magazine on the floor. He picked it up and saw a picture of a man whistling. Tim wanted to whistle too, so he tried to make the same sound. He blew air out of his mouth, but no sound came out. Tim felt sad that he couldn't whistle.
Tim's big sister, Lily, saw him looking sad and asked what was wrong. Tim showed her the magazine and told her he wanted to whistle like the man in the picture. Lily smiled and said she could teach him how to whistle. Tim felt happy and excited to learn.
Lily showed Tim how to put his lips together and blow air gently. Tim tried again and this time, he made a small whistling sound. He felt so happy and proud of himself. He looked at Lily and said, "Thank you for helping me." Lily felt a little guilty because she knew she should have helped him sooner, but she was happy that Tim could now whistle. They both laughed and whistled together, making music with their new skill.
