The original sentence "Learn about animals and learn how to draw them!" is grammatically correct, but it can be improved for style and clarity.
Here are a few suggestions:
- Use parallel structure to avoid repeating "learn": "Learn about animals and how to draw them!"
- Add clarity: If the sentence is an invitation or title, it may be clearer to say: "Discover animals and learn how to draw them!" or "Explore animals and learn to draw them!"
Summary: The original sentence is not ungrammatical, but it can be more concise as "Learn about animals and how to draw them!"