Retrofitting an existing home with so-called "Internet of Things" gadgets isn't cheap, but with the right tools you can hack cloud functionality into your dumb appliances. littleBits is an ever-growing library of small electronic modules that easily connect together. Created by Ayah Bdeir, it started as a tool to help designers incorporate electronics into the prototyping process. Today, it's much more than that. Think of them as Legos for the iPad generation.