Stupid-Pet-Trick Sketch

I have 2 ideas for my stupid pet trick.

1. CAMERA TRIGGERED BY SENSOR IN HAT
I would like to create a device that takes a photograph using a digital camera after a physical interaction triggers it. I would like the camera to be triggers once someone puts on a specific hat, with a sensor in it, and sits in front of it.

I can do this externally using servos or I can open it up and replace the shutter button with the trigger connected to the sensor.

2. MONEY JAR
The goal would be to create a money jar that can calculate the amount of money in coins that is put into and and outputs that amount. The jar will have one level in the middle of the jar that will have a weight sensor on it and will calculate the amount inputted based on the weight. Only one coin at a time can be inserted and a lever will release the coin to the bottom, before inserting the next.