What are the best ways to tone up tummy?

Anonymous
I'm a fit guy, only thing I'd like is to tone up my tummy area a bit. I find it easy to tone and bulk up everything else, but only tried crunches for my tummy and I don't like doing them thus i usually don't end-up being successful there. I don't need to lose weight, just tone up my tummy.
What are the best ways to tone up tummy?
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