What do you understand by microcontrollers? How do they work?
What does the arduino platform stand for and how can you use it to power the Internet of Things?
What are sensors? Differentiate between analog and digital sensors.
What are possible applications of IoT in health/Agriculture/sanitation
The following links should help you find answers:
At the summer camp, we will be making at least one (non-mechanised) device from paper. Search online for things you can build from paper and get your imagination running!
You might also later consider taking an online course, such as this one. You may also find this exhibition book interesting.