Here's what the sentence means, step by step:
- Weather can be rainy, sunny, cold, or hot — it doesn't stop living things.
- People, animals, and birds like to try new things.
- They usually enjoy or have fun with those new things.
Three simple rephrasings:
- Rain or shine, people, animals, and birds like to try new things and have fun.
- No matter if it's cold or hot, people, animals, and birds explore new things and enjoy them.
- Whatever the weather, people, animals, and birds discover new things and smile about them.