The armor soft material: D3O

The material eating soft but not eating hard is called "D3O". 

http://www.d3o.com 

It also can be used in the tires. 

Can the material D3O be transparent on the front of the iPhone? 

I'm afraid it impacts from the front side. 

Aerogel

Driving the Roll Ball by iPhone/iPad

http://www.gosphero.com

Do you see the future vehicle?