I have the same problem. I manipulate them into the river, then pop them up and throw them onto the other side of the river. Then I throw them against the pillars and nothing. I don't know why I'm posting, because I'm not helping but? PS the stage with the large waterfall, the second one, where you jump up the waterfall. The first waterfall just has a koin if you break the walls by throwing a clay soldier into it (far left of the screen).

Offical UNlockable Thread Tha't an old unlockable thread for Mortal Kombat Shaolin Monks,it has info and solutions for all the unlockables in MKSM,check it,and one more thing,next time use the Search Feature,i have found that thread using that helpful tool.

Listen to this guy next time and use the search feature.