Here’s a fun, simple project that will help you create a secret button for your bag! Here’s more from CMoz via instructables:
This is a great way to make your own pressure-sensitive button that you can incorporate into your wearable designs. When making wearables that fit and move with the body, it can be difficult to find the right sensors, buttons, and similar, so it’s great if we can make the exact one we need.
You can use this pressure-sensitive button as presented here, to alter the number of LEDs being lit, but you can also use it in any of your microcontroller designs. Connect it as a switch to control your NeoPixels!