Primary Physical Computing Training – Crumble in KS2

I had the honour of authoring the KS2 Physical Computing course for the NCCE over the Spring and got to deliver the course for the first time this summer term!

Getting to grips with the Crumble
Build, wire, code, watch!


The course aims to introduce teachers to the Crumble micro controller; a lovely piece of kit that is so open ended, pupils can create all kinds of robotic autonomous systems.

If you are interested in booking yourself on the course, have a look to see if there are any in your area:

Teach Computing: Introduction to Physical Computing – KS2 Crumble

If you want to know more in general about Physical Computing, have a look at my blog post:

Physical Computing: Where do I start?

Apart from having a lot to squeeze in to a short amount of time, the course was a great success and the participants (teachers from KS2 and KS3!) left with confidence to begin delivering physical computing lessons with their classes.

There will be more of these courses put on in the very near future; there will also be the opportunity to loan (for free) a class set of Crumble kits for your school from your local computing hub. Click here for more information: NCCE Physical Computing Kits for free hire

Year 5 Crumble Creations – 2021

My fabulous Year 5 pupils have been busy applying their skills and knowledge to design their own robotic systems!

Following the 4 levels of abstraction (see below for links on my approach to physical computing), they have gone from design algorithm…


To coding…


To building and wiring…


To finally running the code and evaluating!!


I am so proud of them and their creativity!! Let’s hope this inspires pupils and teachers across the world!

If you’d like to read more and see other examples of pupil’s Crumble creations, please take a look at my approach to teaching Physical Computing.

DIY Crumble Cart!

Teaching Physical Computing is mandatory in UK Primary Schools (See my previous post on Physical Computing: Where do I start? for more information)

One of the best products out there to deliver this fun and exciting part of the curriculum, is Redfern’s Crumble micro controller.

Here are instructions and resources for you to build your own little handy Crumble Cart. Just big enough to carry around your battery pack, Crumble and maybe even a couple of crumbs!

You will need: Printed template onto A4 card (or make it yourself from the measurements!), a pencil and some blue tack to make the holes and some scissors.

This is designed for two Crumble Motors, which can be bought along with everything else, from Redfern Electronics.

Watch the video for instructions and an example of how you can use it!

Just in case you’re interested, here is the code I used to program the cart as seen in the final part of the demo video…

Crumble Code for the Cart Demo in the Video…

Print this full size on to A4 paper (borderless if possible) then follow the instructions in the video.

If you prefer to draw your own, here are the measurements!

You can also head here to the official STEM resource library to download it: Build your own Crumble Cart!

KS1 and KS2 training in specialist computing areas

Primary Computing remote CPD courses
Primary Computing Remote CPD Courses

Phil Bagge and I are delivering remote training sessions on some of the more niche areas of the computing curriculum. From Physical Computing to 3D design, take you pick in this quality (yet cheap – only £40) training opportunity.

Download the PDF flyer below and you can click on each course title to book on.

For even more CPD opportunities in both primary and secondary, please visit:

Park House School CPD Network – remote and online training

‘Detector Bot’ wins place among Redfern’s online projects!

My student – William Bradley – has had his amazing design picked up by none other than Crumble creators Redfern, as a project for others to download and build.

Redfern tweeted about their amazing new project, inspired by William:

You can read all about the project and how to download and build it on Crumble’s Scanner Bot Project Page.

They also wrote a blog post about the Scanner Bot, referencing William as the inspiration behind the project. I’m very proud to say they also referenced me and my approach to teaching Physical computing:

In his blog about the teaching that went around this project, Phil outlines his creative approach to teaching physical computing. Instead of having a set project in mind, he teaches the children how to use the individual components, and then lets them use their imagination to come up with a project. We really like this approach to physical computing, as it enables children to work within their means, and push themselves to their own limits. The phrase “low floor, high ceiling and wide walls” comes to mind here.

Daniel – Redfern Electronics

I’m really pleased that they also picked up on the importance of the design stage; something I’ll always be a great advocate of in both physical computing and coding projects.

So thank you Redfern, and massive shout out to William; I’m so proud of you! Let’s hope this inspires both teachers and pupils alike in their computing adventures…

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