The T-Cobbler is an add-on prototyping board specifically designed for the 2x20 connector-type Raspberry Pi and can break out all those power, GPIO, I2C, and SPI pins from the 40-pin header onto a solderless breadboard. This set will make "cobbling together" prototypes with the Pi super easy.
You will also need the ribbon cable for this breakout board.
![ribbon cable](https://cdn.shopify.com/s/files/1/0647/7702/7824/files/RaspberryPiT-CobblerGPIOBreakout_480x480.jpg?v=1697089760)
All pins are clearly numbered and make prototyping so much easier.