For both individual and group entries. Give only ice cream sticks and glue (you can add thread or match sticks or newspaper also) as material. Give an elaborate task. The participants are supposed to use the sticks to build a structure that should achieve the goal. For instance: Build a bridge that holds a standard size mobile phone for at least one whole minute. Or Build a boat out of the matchsticks that will take a mobile phone from one edge of a water body to another.
