Statistical Sampling Paddle

In high school I took a Probability and Statistics class and my teacher had this really cool setup for doing experiments in statistical inference using random samples. It was a big wooden bowl with 10,000 marbles of various colors, and paddles that had different numbers of holes in them.

I scoured the internet looking for a set that I could purchase to help teach my kids the formulae, but found nothing. So I had to assemble my own.

This is the 100-sample paddle. I may eventually make other sizes. This model works with beads or marbles that are 8mm in diameter.