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yea i know about them , but never tried to buy , i think all the joy of watercolor is about working with Brushes and water drops . ^^
but maybe they are good too, i don't know :)

it's good for adding some fine details - and you still work with brushes, otherwise there would be no point in using them.

oh next time maybe i'll try to buy some! , <3

not exactly cheap: not any more expensive than any other good quality colored pencils.