Some really clever work by street artist Pasha183 out of Russia. His playful interaction with urban surroundings, turning common structures like bridges, walls, and street lamps into places for art.
interactive
New Interactive Street Art
Ernest Zacharevic’s unique style of street art often relies on the interaction between physical objects and painted murals. The Malaysia-based artist traveled to Brussels and Panang to create some of the works seen below.
An Outdoor Library in Ghent
The outdoor library entitled Bookyard was built by Italian artist Massimo Bartolini for the Belgian art festival TRACK: A Contemporary City Conversation in Ghent. Visitors are invited to peruse the stacks and are free to take any book they find for a small donation at a designated box. 
Color Commons
Color Commons is an interactive public art work where the public can change the color of the Boston Greenway Light Blades by sending text messages to them.
Young woman texting in a color for the panels
The Panels on the Greenway at Night
Individuals interacting with the Public Art piece
To view the Panels in action check out the link below:
Interactive Sculpture – Marbles
Netherlands based design group Studio Roosengaarde produced this interactive piece of public sculpture titled Marbles. Each of the forms are filled with sensors, LEDs, and speakers which allow them to interact not only with people engaged with them but also with each other.
One of the things I really like about this project is that everything about it lends itself to being really approachable. The scale, materials, and activity of the sculpture all add up to a piece that is, in the words of the designer, something of an “interactive playground”. See more of Studio Roosengaarde’s work at their website HERE.
Public Artwork 