Nice sentence! Here are a few correct ways to write it and a short, simple explanation.
- Simple: The tiger's fur is striped, and its skin is striped too.
- More natural with surprise: The tiger's fur is striped, and, surprisingly, its skin is striped as well.
- Short: The tiger's fur and skin are both striped.
Why change it?
- Using the word "surprise:" with a colon is a bit odd in this sentence. "Surprisingly" (with commas around it) sounds natural: it shows you are surprised.
- "Too" and "as well" mean the same thing. "Too" is shorter and easier for kids.
- You can also make the sentence shorter by saying "fur and skin are both striped."
Pick the one you like best! :)