Halloween Curry
Scroll down past the two images below for the recipe. For images of every stage in cooking, click here. A friend of mine gave me the big pumpkin in the… Read more Halloween Curry →
Reversing Fish
In my new book, How to Find a Rainbow, Reena and Rekha discover that you can only see a rainbow if the sun is shining behind you and it’s raining in front of you. This ‘reversing fish’ makes use of some of the same science that explains how rainbows form! You will need: • A clear cylindrical glass or jar of water • A piece of scrap card or paper • Something to draw with What to do: Step 1: Draw a fish on your piece of paper about a third of the… Read more Reversing Fish →
Re-appearing Rainbow
In my new book, How to Find a Rainbow, Reena and Rekha discover that you can only see a rainbow if the sun is shining behind you and it’s raining in front of you. This ‘re-appearing rainbow’ makes use of some of the same science that explains how rainbows form! You will need: • A clear plastic (polythene) bag – ‘ziploc’ or clear plastic document wallets work well. • The rainbow template you can download below • Coloured felt tips (ideally all seven colours of the rainbow) • Black permanent… Read more Re-appearing Rainbow →
Crisp-Tin Camera
I write about using pinhole cameras with my students in my book Why Don’t Things Fall Up? and include instructions for making one in the book. I also included instructions in Mr Shaha’s Recipes for Wonder. This (rather rough and ready) video shows how to make one. See below for written instructions: You will need: 1 Pringles or similar crisp tube (wiped out and made clean) Sellotape Duct tape or aluminium (tin) foil Scissors or a bread knife 12 cm by 12 cm piece of greaseproof paper (preferably white, not… Read more Crisp-Tin Camera →
Sylheti Kissoori / Khichuri (Rice & Lentil Porridge)
“Kissoori” as people from my part of Bangladesh (Sylhet) call it, is a comfort food that I love, particularly when feeling poorly, and which proved to be an excellent first… Read more Sylheti Kissoori / Khichuri (Rice & Lentil Porridge) →
Balancing Reindeer
One of the easiest but possibly the most delightful activities in Mr Shaha’s Marvellous Machines is the Balancing Bird. Erich Landstrom (@ScienceGiant on Twitter) took inspiration from it and designed… Read more Balancing Reindeer →
Sinkeroo!
This is a game I first heard about from my friend, the brilliant science educator Sai Pathmanathan, who saw some children playing a version of it at one of the science clubs she runs. I have adapted the game and come up with some rules, which you can download by clicking the link below. It’s incredibly simple to make, and fun to play with children or adults. You could make the game extra special as a gift by selecting items which perhaps hold some special meaning for the person you… Read more Sinkeroo! →
Soapy Surfer
This is perhaps the easiest “machine” to make in the book and is a dramatic demonstration of the effect of soap on water. EXTRAS: written instructions and the science of how the soapy surfer works can be found in this piece I wrote for BBC Focus Magazine. Click here for an article on why washing your hands with soap is better for killing viruses than using just water or alcohol-based wipes or handwashes. Below is a video I made with the Royal Institution in which the comedian Rufus Hound shows his son… Read more Soapy Surfer →
A-level Physics Equations
Here’s a word document with most of the equations used in A-level Physics so you can cut and paste them instead of writing them out in Word’s equation editor every time. Please let me know if you spot any errors.