This looks like a good entry price for Microbit kits. I’ve ordered just the board and plan to take some of the sensors I already have and make them compatible with the board.
“BirdBrain Technologies is thrilled to announce the next generation of the Hummingbird Robotics Kit! The Hummingbird Bit provides new features for your robot creations at a lower cost.
The Hummingbird Bit controller is powered by micro:bit and allows for projects to be untethered. It works with all computers & tablets and with both block- & text-based programming.”