Penny Floor - don't know if I would have the patience for a whole floor. but a coffee or patio table would be nice! Also an easier way to do it is to put out the pennies then flatten then by, I don't know, maybe a broom or some thing.
corner gallery wall - without the specially made corner frames. Would need to be on a corner that is in an open area; this would be really overbearing in a tight hallway. But in the right space it could look amazing. Very art gallery.
Lego cable holder - an awesome way to help you organize your cables! My husband loves lego crafts of all kinds & these lil guys are a great cable tidy for your home office. In need of more home office ideas? Check out this post
Kreativ wohnen: Diese 4 coolen DIY Möbel kannst du ganz einfach selber machen!