Algodoo

One time, a red one dropped into the yellow bin because the boards got all bunched up at the beginning. It happened only once when I ran the scene five times, but if you care about perfecting it, the mechanism might need a little work to prevent that bunching from happening. Except for that, it works fairly well.


EDIT: The very next time I ran the scene after posting the above comment, an orange board ended up in the green bin! The same problem was caused by bunching of the boards at the beginning.

I solved the problem by using a conveyor belt. I think it works every time now.

The first time I ran the scene after you fixed it, one of the small red boards got jammed at the input section to the rollers. The leading edge of the board rotated up and got stuck against that angled gray structure that's at the end of the conveyor.

Hope it finally works.

YES! It works great now. I ran it a number of times and it never failed. GOOD JOB!

I've also made a ball sorter.