Here’s a great project in progress from the Adafruit community. “Pete.M” is looking to create a “universal” AVR ISP shield, as described in the Adafruit Forums:
I ended up using extra-long header pins for the shield mount, and added a row of header pins along each side of the ZIFF socket. I can use female-to-female jumpers to map any Arduino pin to any pin on the socket.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.