Help with science project?

So we are approaching the end of our first science unit, optics. The task of the project is to introduce daylight into a dark attic which will be renovated into a home office. Challenges- no windows in the room, light source must come through the roof in any form of tunnel ( pringles can ), and it must only be slightly invasive to the house structure. So obviously I am not illuminating an ACTUAL attic but rather a box that our teacher provided. The scale must be quite small and we were recommended to use objects such as small tubes, lenses, mirrors, and or tin foil. The only problem seems to be that I have to illuminate the box as the light source will move over it from a morning to night scale ( the sun). it ALSO has to be water proof. can anybody help me come up with a design ?