20-in-1 micro:bit Wonder Building Kit (micro:bit not included)

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Sale price £77
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Only 9 units left

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The Elecfreaks Wonder Building Kit is a box jam-packed with creative building brick projects for your BBC micro:bit (not included) and the included sensors and components. Learn how to code in the most fun and engaging way possible - by creating cool building brick projects that move and react using code YOU designed!

Including the popular 'Wukong' micro:bit expansion/driver board, over 400 building bricks, a range of different electronic sensors (line-following sensor, obstacle and water level), motors, servos, cables, fixings and more - it's a big box of fun for micro:bit fans new and old!

The Wukong expansion board has a built-in 400mAh battery supporting 20-minute fast charging and can run a project for ~40 minutes (depending on the project and usage).

The board can drive 8 sensors, 8 servos and 2 motors, and includes a convenient on/off press switch, four programmable RGB LEDs, integrated buzzer and ambient 'breathing' blue LEDs on the underside! It's also building brick compatible with a 7x5 brick compatible baseboard!

Wonder Building Kit

Lithium Battery Shipping: This product can only be shipped to the UK mainland. With this item in your cart your shipping options will be limited and may cost more than our usual rates. Why?

20 Building Projects!

Compatible with your own building bricks, the set includes 400+ bricks to build the 20 example projects including robot arms, a bigfoot monster, forklift and more!

All of the projects a coded with Microsoft makeCode - the easy to use graphical drag n' drop programming environment

  • Robot Arm
  • Aerial Ladder Truck
  • Bigfoot Monster!
  • Basketball Counter
  • Boating
  • Rotary Chairs
  • Smart Airer
  • Rickshaw
  • Road Sweeper
  • Automatic Doors
  • Gyroscope Base
  • Forklift
  • Crawler
  • Tiny Sky Wheel
  • Seesaw
  • Reading Range Guitar
  • Obstacle-avoiding Car
  • Line-following Car
  • Motorcycle
  • Walking Robot

Kit Contents

  • Wukong Expansion Board (building brick compatible motor/servo driver with integrated battery and programmable LEDs)
  • 400+ Building Bricks
  • 2x Motors
  • 1x Servo
  • Sonar:bit object detecting sensor
  • Line tracking sensor
  • Water level sensor
  • Line following map
  • Micro-USB cable
  • Pin puller
  • Screwdriver
  • Fixings
  • Rubber bands
  • Dupont wires



  • Sensors: Water level sensor, line-following sensor, Sonar:bit
  • Bricks: Over 400pcs
  • Control: micro:bit & Wukong expansion board
  • Communication: USB port
  • Size: 250 x 190 x 100mm
  • Weight: 1150g
  • Motor drive: 2 ways (M1,M2)
  • Servo drive: 8 ways (S0~S7)
  • Projects: 20

Wukong Expansion Board

  • Power System: Click once to start, double-click to close
  • Battery: 400mAh lithium polymer
  • Working Voltage: 3.7v~5v
  • Working Temperature: -20°C~60°C
  • Size: 40mm x 58mm
  • Weight: 41.6g
  • Motor drive: 2 ways (M1,M2)
  • Servo drive: 8 ways (S0~S7)
  • IO Ports Breakout: P0/P1/P2/P8/P12/P13/P14/P15/IIC
  • Rainbow LED: LED0/LED1/LED2/LED3
  • Atmosphere LEDs: 4 programmable LEDs
  • Building Brick Baseboard: Standard 7 x 5 baseboard


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