Your phrase "Learn about animals and how to draw them!" is grammatically correct.
Here's a breakdown:
- "Learn about animals" is a clear and correct phrase indicating gaining knowledge on animals.
- "and how to draw them" complements the first part, indicating gaining skills on drawing those animals.
- The conjunction "and" correctly links the two related learning objectives.
- The exclamation mark is appropriate if you want to express enthusiasm.
Overall, the sentence is clear, concise, and grammatically sound. You can use it as is!