Simply just make colour bombs. It might be hard, but as long as players remember the methods of creating them, they should be fine. Hopefully with one colour bomb released, it will be easier to make the subsequent ones.
To collect 10 striped candies, simply mix one of the colour bombs with a striped candy. Bingo!
Only mix one of the colour bombs with a striped candy. The other ones should be mixed with wrapped/random colour, as if two colour bombs are mixed or one mixed with striped will not eliminate a colour temporarily, and making colour bombs will be harder without the colour elimination.