You can make a nice flute that works like a trombone. It has a sliding piston which makes high and low tones when you slide it in and out. Have a look, the mouthpiece is a little tricky, but with the help of an adult you can do it.
You need to blow into the mouthpiece with your lips around the end of the whistle. Slide the piston in and out and hear the tone go from low to high. You can try to play a tune, but most of the fun is just experimenting with the sound! Your friends and family will be impressed, for a little while at least…
The ramp is cut into the plastic pipe, this is a little tricky! Cut straight into the plastic electricity tube at about 2.5 cm back from the end. Then cut at a slope to meet the straight cut at the greatest depth. You need a skilled adult to help you; ask a craftsman or an electrician/plumber, to do this for you, they will enjoy it and might even make an extra flute for themselves. Adults can be kids too….
The flute’s mouth piece. Note the cork is cut about one quarter from one side. When you blow with your lips around the mouthpiece, the air is directed towards the ramp. The ramp makes the air vibrate in the body of the flute and that makes the sound!
Flute’s body and piston side by side. The piston slides in the body and makes the different tone. Put a little Vaseline on the leather piston, the piston rod can be made from dowel wood.