Cytron KIT-RBT-APW-NB - Auto Plant Watering Kit for micro:bit (without micro:bit)
Elecrow DTS02115S - LCD1602 Display for Micro: bit 2.0
Elecrow BBC DTS03558C - Crowtail Base Shield for Microbit - V2.1
Elecrow DTS04012R - Four Channel Relay for Micro: bit
Elecrow DTS04512B - BBC Micro bit Prototype Expansion Board
BBC MB 46124
Monkmakes SKU00060 - The MonkMakes Speaker for micro:bit is a neat little amplified speaker that connects to the micro:bit using alligator clips. Despite its small size, the speaker is pretty loud.
BBC MB 5635
Kitronik 5635 - Clock Board (RTC) for the BBC micro:bit
Pimoroni PIM371 - Control and monitor your world with automation:bit! It's tolerant of up to 24V, with analog and digital inputs, outputs, and a relay, so it's ideal for automating low-voltage systems in your home.
Seeed Studio 103100063 - Grove Shield for micro:bit v2.0