I am not music expert in any way but here is whistle that I made some months ago. It's decorative, reminds Easter, can be nice for children as a gift for Easter and makes sound (flute/whistle like).

I managed to produce 3 notes and it needs some practice to make nice sound. The first 2 options have a top hole (were you blow) and 3 holes

But then I found out that there is a very similar instrument called Xun that has also has 2 holes in the back for the thumbs so I made a third Easter option (Easter texture) with the 2 additional holes.

It doesn't have any intent to be a real instrument, just a passtime.

And it's decorative too, so I made a little stand with a similar pattern to the light blue one, in case you want to use it as a Easter decoration.

HOW TO USE IT

The top hole is the one where you need to blow to produce the whistle.

Cover with your fingers tips the other holes.

Put your mouth on top of the upper hole (perpendicular) with the upper lip protruded and the lower one a little back. push the egg wall on your chin and try blowing on the hole…practice!

Find a specific guide of how to blow on a flute here (It's exactly the same approach I used, regarding the way to blow this Egg whistle).

https://www.wikihow.com/Blow-Into-a-Flute