teeth, teeth! Sharp and big ;) relative to hamster size.
LuckyDee, catch some (1-2 quite enough for first time) grasshoppers. Green, fat and the bigger the better. And insert alive to hamsters cage. Ouh... Your beast not a vegetarian. Be careful :D
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well not bigger than hamster itself (I don't know how big your grasshoppers are). 2-3 cm. 5 cm will be a challenge. Hamsters catch them (in cage or box - easily), sometimes jumping from a good distance. Gnaw the head... And you will see what his teeth can