I'll show you, how to monitor some hardware variables.

Grab an Arduino and turn it into a Power Point pointer using an IR sensor and your TV remote.

Hand gesture control using Arduino Leonardo and IR sensors.

Using an optical flow sensor to turn gestures in the air into mouse movements.

Using WiFi to control your Arduino UNO, Nano or Mega as a basis. Includes feedback and simple hardware.

A modular orientation and acceleration data logger using a pair of ultrasonic sensors, RF transceivers, and a 1Sheeld.

A walking gorilla built with EDUBOX kit.

Make an interactive project on the LattePanda, plug in sensors to make it more funny. You can also do it on your computer or Raspberry Pi!

Arduino Mkr1000 + Uno + Leonardo + Java = Christmas shooting game.