The Kitronik :MOVE mini buggy kit is a fantastic and compact starter robot for your BBC micro:bit(s), priced at under $50! If you've recently bought a Micro:bit, this is definitely worth a look. The kit comprises the robot and the battery-powered Servo:Lite board, and comes with a well-written instruction booklet, that starts you programming straight out of the box, during the build process. The BBC micro:bit is available separately. Features include: highly manoeuvrable has an array of bright colour-changing LEDs that can be individually controlled with brightness and on/off pop a felt-tipped pen into the hole for continuous drawing custom blocks for easy PXT drag...
Although there's plenty of wireless small-sized keyboards available, it's quite hard to find a USB wired keyboard with nice action, that's large enough to type comfortably, yet small enough and easy to transport for demos or teaching.
We found a great robot platform in the 4Tronix Bit:Bot: It harnesses the neat features of the micro:bit, providing an easy-to-setup, full-featured, and expandable robot that comes in at a good price, compared to other robots with the same features.
The Mirobot stood out to us as a really nice robot to use for teaching maths and programming, and it's quite intriguing to watch it draw. Just connect it to wifi and use the apps to program it through your browser!