How Many Smart Devices Running Linux Do You Have in Your Home?

Before attempting to answer the question above, I want to remind you that if you have a Wi-Fi router and an Android-powered device in your home, then you have at least one or two devices running a Linux kernel-based operating system. Also, I see numerous projects on Kickstarter that are using a Raspberry Pi device as their hardware base and a GNU/Linux operating system as their software base for programming stuff.