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You are here: Home > Products > Electronics / Robotics > Crumble


The Crumble is a low-cost, easy-to-use electronics controller. A few 'croc' leads and a USB cable are all you need to connect motors, LEDs and sensors and begin experimenting. No progamming experience is required as the free software is a graphical, drag-and-drop system inspired by MIT Scratch.

Key Features:
  • Robust
  • Low-cost
  • Easy to get started
  • Built-in motor drivers
  • Connects via USB
  • Can run on 3 AA batteries (4.5-5.5V)
  • Built in support for servos, distance sensors, Sparkles (full colour LEDs)
  • Fast connections can be made with crocodile clips; many croc-clip friendly components are available
  • More permanent connections can be made with solder, terminal blocks or conductive thread and standard components (switches, LEDs) can also be connected
Crumble Controller
The Crumble is an easy-to-use programmable controller. It can drive 2 motors forwards and backwards at variable speeds. It has 4 IO (Input/Output) pads which allow connections to switches, LDRs, low power LEDs and so on.

The Crumble has been designed to encourage tinkering,
using ‘croc leads’ for quick and simple connections. Pads allow terminal blocks to be fitted or a direct solder connection made, while the larger 4mm holes make an easy target for conductive thread and needle.

The Crumble software runs on PC, Mac and, in the near future, Linux (including the Raspberry Pi). Inspired by MIT Scratch, programs are simply built by snapping blocks together on screen. Sending a program to the Crumble is almost instant, allowing rapid experimentation.

The Crumble can be extend with digitally controlled full-colour LED, called Sparkles. Additionally, several expansions board (Crumbs) are also in the works.
Crumble Controller
Order Code: EL-CRMB1
Crumble Class Pack
A comprehensive kit for classes of up to 30 pupils, supplied in a Gratnells tray. All components can be easily connected using “crocodile” leads.

Software, instructions & project suggestions are free to download.

  • 16 x Crumble Controller
  • 32 x Sparkles
  • 16 x Crumble-friendly Light Sensors
  • 16 x Crumble-friendly Buzzers
  • 16 x Crumble-friendly Push Switch
  • 16 x Crumble-friendly Battery Boxes (with short circuit protection)
  • 16 x Croc leads (set of 12)
  • 16 x Micro USB Cables
  • 32 x Geared Motors with Croc Leads
  • 32 x Wheels (to fit motors)
  • 1 x Gratnells Tray with Insert
Crumble Class Pack. A comprehensive electronics kit for up to 30 pupils, supplied in Gratnells tray.
Order Code: EL-CRMBPK1
Official Crumble Starter Kit
Official Crumble Starter Kit
The Starter Kit is a very popular way for schools to get their hands on a Crumble kit, with many opting to buy 15/16 for a class of 30 pupils. Suitable for a number of projects.

  • 1 x Crumble controller
  • 12 x Croc leads
  • 2 x Sparkles (controllable RGB LEDs)
  • 1 x Crumble-friendly switch
  • 1 x Crumble-friendly light sensor
  • 1 x Crumble-friendly buzzer
  • 1 x Micro USB cable
  • 1 x Crumble-friendly switched battery box
Official Crumble Starter Kit
Order Code: EL-CRMBKT1
Crumble Cub Robot
Crumble Cub Robot
Used as a drawing buggy, it’s a great introduction to controlling robots. Challenges can include drawing geometrical shapes, repeating patterns or get mathematical and work out the link between the program and what the buggy is doing. We highly recommend using the buggy with a white board marker on a surface that can be cleaned to allow for experimentation.

Using the line follower or ultrasonic module allows investigating and programming autonomous vehicles.

The kit includes:
  • Robot chassis with pen holder for narrow and broad markers
  • Crumble controller
  • Sparkle
  • USB lead
  • 2 Motors
  • 2 wheels with tyres
  • Line follower widget
  • Ultrasonic distance sensor
  • Croc leads
  • AA Battery box

The 3D printed chassis of the robot (designed by UKSTEM) is clip and slot together with an estimated build time of 10 minutes.
Crumble Cub Robot
Order Code: EL-CRMBRB1
Crumble Robotic Vehicle (full kit)
This kit, designed by Machine Realm, includes everything you need to build a line-following robot, controlled by the Crumble.

The kit includes:
  • Robot chasis
  • 1 Crumble
  • 1 Sparkle
  • USB lead
  • 2 Motors
  • Line follower board
  • Croc leads
  • 3 AA Battery box

The chassis of the robot is constructed from laser-cut acrylic and machine screws. The estimated build time is between 1 and 1.5 hours.

The robot is controlled by the Crumble, programmed over USB using our free, Scratch-inspired software. The kit can be used with or without the Sparkle and/or line-following module.

Printed assembly instructions are included and can also be downloaded below.

Assembly Instructions
Crumble Robotic Vehicle (full kit)
Order Code: EL-CRMBRB2
Jaws Add-on for the Crumble Robotic Vehicle
Jaws Add-on for the Crumble Robotic Vehicle
Servo powered jaws for your CRV! Includes servo and a test cone.

Assembly Instructions
Jaws Add-on for the Crumble Robotic Vehicle
Order Code: EL-CRMBRB2A