This nature game is a bit more challenging that making grass whistles.
It’s still a good way for one or more players to enjoy nature.
You Need:
- One acorn cap - look near oak trees (a bottle cap is a good substitute)
- Your two thumbs
How to Play:
1. Place your thumbs across the hollow side of the acorn cap
2. Position your thumbs so there is a V-shaped opening above them and a bit of the upper acorn cap edge is exposed
3. Blow into the base of this V
This make take practice and a bit of adjusting, but eventually you will hear a sound like a tea kettle whistling.
If you have access to different types of oak trees, try using different acorn caps. Can you hear a difference from one type of acorn to another? What about two that are the same species but different sizes?