I made this today, by hand. It's a bamboo whistle. It will gradually change color. If you need a strap hole, please let me know via the transaction message. I will make the hole before shipping. The side-blown flute produces sound by covering both sides with your fingers and blowing air into the middle hole. The end-blown flute requires you to cover the bottom hole with your index finger and blow air into the diagonally cut hole while covering the opposite side with your lips. It takes practice, so try various methods to get the hang of it. Size: Side-blown flute: Approximately 1.8cm outer diameter, 1.8cm length