Apparently you do have to start with the numbers in the right place but other than that you're free to decorate this Draw It Yourself calculator as you please. It's surely the 21st century alternative to carving the initials of your beloved into your calculator case with a compass. Because - although they've covered it with pictures of robots and spaceships - you'd obviously cover it with notes about who was the cutest in your maths class, right? Or possibly the cutest of your work colleagues if you are over the age of 18 and have no sense of shame. It's £6.99 from Monster Stuff.
Much more fun than writing lists all over your hands is drawing all over your wrists. This paper watch, a blank canvas for your art, is apparently tear resistant (I'm guessing it's made from something like those festival wristbands) so your drawing can be preserved for ever. Unless you wear it in the shower. Or to do the washing up. Just remember to treat your doodles with the honour they deserve, okay? It's yours for £9.99 from Firebox.
Remember the doodle duvet? And the tablecloth? The clever people behind both those designs, Stitchdesignworks, also produce a doodle apron. Priced at £16.50 it comes with a set of wash-out pens that you can use to jot down ingredients, instructions and timings while cooking. Or use them to tell someone to get the hell out of your kitchen. Whatever you decide to say, it'll be gone when you put the apron through a 40 degrees wash.
See. It's fab-ioli.
If you're lucky enough to own an iPhone 5, you're lucky enough to get the most from a doodle case too, available from Iwantoneofthose. £12.99 gets you the phone case, and its own special pen, and also a cleaning fluid. Meaning that, when the owner of the case pictured decides that boys aren't stupid after all, she can rub that off. And then, of course, write it straight back on again when she quickly realises that they really are quite stupid. (IDST)
So go, let your curiosity and creative juices run wild. And, remember, thanks to Stuff Your Doodle, you'll always be able to let your creations run wild too.