Warm up: Construct various structures on a flat surface using only four craft sticks and four upside-down paper cups. Each structure must support a fifth cup (right side up) above the flat surface. Sketch some of your structures below.

Challenge: Construct a structure to support the fifth cup using the same materials as before, but with the following restriction: each upside-down cup can only support a single craft stick. No craft stick can be used to bridge the gap between two cups. Sketch your solution on the back of this sheet.