Your sentence is almost perfect! Here is a corrected version with very small changes for clarity and grammar:
When spring arrives and the snow melts, the male capercaillies put on a big show. They fan their tails and make funny coughing and popping noises to get attention.
Explanation:
- "When spring arrives and the snow melts," is a good introductory phrase.
- "the male capercaillies put on a big show." is clear and correct.
- "They fan their tails and make funny coughing and popping noises to get attention." is also correct.
This means the sentence is grammatically correct and easy to understand for a 6-year-old!