Make lights blink and other stuff with a Circuit Playground board.
After plugging in the board via USB, check dmesg output to determine the storage device.
You can check the drive info as so:
$ sudo blkid /dev/sdb1 /dev/sdb1: SEC_TYPE="msdos" LABEL="CIRCUITPY" UUID="4921-8571" TYPE="vfat"
You can then mount the drive as so:
$ sudo mount LABEL="CIRCUITPY" /mnt