||To construct a freestanding tower out of plastic drinking straws.
||To demonstrate problems of structures e.g. stress points.
||Any number of individuals or teams.
||Straws (not milkshake straws), scissors , dental floss, tennis
||The tower must be constructed within one hour.
||The tennis ball must be balanced at the pinnacle of the tower.
||The tallest structure that can support the tennis ball wins the
||Youth Science Foundation Science Olympics Manual.