Sounds a little weird, but when you’re playing an instrument that tone-holes like the recorder does, using the tip of your finger where the nail is won’t plug the hole completely. So, I describe the pads of my fingers as the “squishy part”. It works because young kids don’t quite understand what the pads of their fingers are, but they do understand the squishy part when I describe it and show them. It’s a description that makes sense, because it’s very visual.
Then to help them understand why that works, I ask if they know what a drain plug is. Most often they do, and can then understand why the squishy part works so well on their recorders.
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