I've always wanted to make a whistle out of bamboo, and couldn't find anywhere on the internet that documented it, so with some trial, error, and patience here it is, in some really simple steps.
You will need:
• a knife
• a saw
• glue (preferably a hot glue gun)
• 2 pieces of bamboo that will fit inside each other.
Step 1: Choosing the bamboo
The two pieces of bamboo you need, must fit snuggly inside each other, without too much force, otherwise the inner piece tends to split the outer piece. Also any that fit too loosely will be harder to block off holes later. You may find that by using different parts of the same length of bamboo, you can find an ideal thickness.