Hand tools and fabrication machines
The parts list for the talking compass is a Micro:bit with its battery pack, an Amp:Bit by Proto-PIC and a speaker. The Microbit is inserted into the Amp:bit and the speaker is connected to the terminals on the Amp:Bit. Just that easy.
You could use a small mono amplifier instead of the Amp:bit, like one from Adafruit.
The software is written in Micropython.