Pasta jar users- what jar?

[fruitcorner]

If you use a pasta jar to motivate your kids, what size jar do you use? I was thinking a jam jar but it might take them ages to fill it and I don't want them to lose heart- if that makes sense. How quickly does your DC fill a jar?

Eh? Fill it with what?

Pasta I assume although I'm debating coloured stones (which would be reward enough in itself for dd1!). I was wondering about size too.

On I see. Not an empty pasta sauce jar.