Turn your digispark into a rubber ducky

The hacking tool.  Looks like someone ported the tools to the ATiny, in this case the DigiSpark system, which runs from $1.5 to $8.   Its not as fancy as the original, but it will do the job.

DIY Rubber Ducky is as Cheap as its Namesake

site:

https://hackernoon.com/low-cost-usb-rubber-ducky-pen-test-tool-for-3-using-digispark-and-duck2spark-5d59afc1910