We love this post.  Gotta go no. 2. LOL .  These are so fun.  The perfect back to school nail art.  The Daily Nail blog provides the following instructions.

I used a mix of China Glaze Salsa and American Apparel Palm Springs for the eraser, China Glaze Millenniumfor the metal band, and then mixed with Zoya Raven for the shadow on the grooves on the band. For the pencil portion, I used Diamond Cosmetics #319 Lemon Yellow Zest for the pencil color, and then mixed with Electric Orange for shading on the sides of the pencil. Topped off the pencil and metal parts with Seche Vite top coatand the eraser with Essie Matte About You to give it that rubery look, but my lotion made it sorta shiny. damn. Oh well, now it looks like one of those old, hard erasers.

I also found an older YouTube describing how to pull-off the same nails.  Good luck.