I can confirm that the information about the resistor is correct.

@XD3l I don't know if there stuff is also in the US but some electronic warehouses sell Xmas calendars for electronics.
There are 24 doors to open and behind every door there is a new (very small) project to build. Here is a list with experiments :) and I think there also is a kit for the Raspberry Pi online :)

Edit:
The kit with RPi experiments