The first step will be to measure her books or have her give me the measurements of her books. Then I will CAD a bookcase based on these measurements in fusion 360. Then, I will have my sister look over the design and have her suggest what to add or remove from the bookshelf. I think designing it in fusion 360 should be enough for my sister to be able to picture what the bookshelf will look like.

I want to print this on the Stratasys because the filament is white and the supports are dissolvable. My sister wanted the bookshelf to be white so that it can match all of her books, and I want the supports to be dissolvable because when I printed the 3D lego from the first class, I accidentally broke it while trying to remove the supports. 

I will make all my sketches in the xz-plane. I’ll extruded each component along the y-axis. I will only need rectangles for the shelf: one to extrude and then shell for the outline, and 2 smaller rectangles to extrude for the first and second shelves. The large rectangle will be extruded 20 mm and shelled inside with a thickness of 5 mm. Each shelf rectangle will be extruded 20 mm and joined with the bookshelf shell to create one body.