Resources linked here are for the Raspberry Jam workshop ‘Fireworks with Raspberry Pi‘. These materials are copyright TechnoVisual Ltd. 2018 but are available to be freely copied for educational purposes.
There are two worksheets, one for the Pygame Zero coding activity and one for the party popper firing servo activity.
They can be downloaded from: here
This zip file contains an stl file of the party popper holder for 3D printing. The servo type used in with this design is a Tower Pro MG996R but there are many other servos of a similar size. This build will not work with the small 9g servos as they are not strong enough to fire the party popper.