tiny guard piece to stop croc clips / alligator clips shorting out on your micro:bit. Designed entirely from the Kitronik mechanical drawings, as the official ones are useless.
All the other designs like this on Thingiverse that I tried were really hard to print. Apart from a small amount of bridging (which any printer should be able to handle) this one should be easier.
Thingiverse link: micro:bit croc clip keeper by scruss