Load the camel with straw, but don't be the one to add the straw that breaks the camel's back! Two piece camel on wheels, held together with a rubber band, will eventually collapse under the weight of the wooden sticks.
Each player takes turns adding a straw to the basket until the camel's back is broken (when the two humps touch). Interestingly, there is no scoring done based on the thickness (and thus the weight) of the straws. Each player picks whichever straw they want. Not sure why anyone would ever use a yellow one.