Here are three shorter, kid-friendly ways to say that line. I kept the idea of a tiny twig and the wobble.
- I'm a tiny twig on the tree.
- A wobbly little twig.
- Wobbling on skinny legs.
How I shortened them:
- I kept the main picture (tiny stick = twig).
- I used simpler words that are short and clear.
- I made three quick, different-style options you can pick from.