Do you need all 6 balls to make the tick work? Could you just get buy with 3 of the 6?

You could get by with only 3. When I perform this effect, I only use three of the balls. The only time it would be an issue is if you were doing a routine where you wanted to use two sets of balls of the same color. Other than something like that, it's no problem to get by with three.

Dave

Thank you so much for the answer