colorful and varied, tin litho whistles are really fun looking. They are pretty cheap for the most part too. That really helps if you are a whistle geek and yet on a budget. They aren't too big or cumbersome, but displaying might be a bugaboo.
I imagine one could collect hundreds without doubling up. Many are Japanese, but identifying makers would be a nightmare !!! Probably just stick with designs and colors. They are of course steel and not tin.
Here's a link for that enigmatic shortened name 'litho'
Do you think clickers would fall into here ??? Oh, yeah….