Since starting iGCSE physics I've had messages from people who'd like to support but don't want to receive Theatre of Science magazine. (WHAT??? Okay fine. Children love it and adults love it but older teenagers are understandably a bit 'meh'). So this is your tier. A lot of work goes into these lessons - finding exam questions and additional reading to support the lesson, scouring the boards' websites and the big physics sites to make sure I've covered everything and covered it well. If you'd like to pay me I'd be extremely grateful! If you put in your address I'll still send you a pair of rainbow glasses because who doesn't want those? And we'll study diffraction at some point and they're a fun illustration of how it works. But that's the last you'll hear from me unless you fancy a chat / Q&A in the lessons' comments section!

At this tier you'll receive rainbow glasses and a description of how they work, and Theatre of Science magazine will come through your letterbox whenever I write it! I'm so proud of it; graphic designer husband makes it look great, it's full of completely original articles, experiment ideas, a comic, quizzes; it takes me ages but is a joy to write. I would love to send it to you, it feels like writing all my Patrons a letter!

• Rainbow glasses, a description of how they work, and the latest issues of Theatre of Science magazine through your letterbox!

New tier! Previously supporters sent me £5 a month and paid an additional £1 VAT. Ko-fi doesn't take VAT! If you're happy to pay £6 you are now a proton! I'll send you rainbow glasses and Theatre of Science magazine as usual, but you'll also receive two past magazines when you sign up! Huge thanks if you sign up at this tier; if everyone let me keep the £1 it would be the difference between me going back to school eventually and this being my full-time job!

• Rainbow glasses, a description of how they work, two magazines when you sign up and the latest issues of Theatre of Science magazine through your letterbox!

If you live outside the UK and want Theatre of Science magazine posting to you, this is your tier! The higher price covers the cost of posting abroad. (Note postage to the Isle of Man and the Channel Islands is the same as in the UK so people living there can sign up as regular Electrons or Protons. I mean I'm sure you know that. I'm just making sure you know I know..!)

• Rainbow glasses, a description of how they work, and the latest issues of Theatre of Science magazine through your letterbox!

If you feel the other tiers are too reasonable, this is the tier for you! Maybe the quality matches other resources you pay more for. Or you feel strongly that science education should be available to everyone. Whatever the reason, thank you! It really means a lot to me that everything I do can be available for free, because enough people support. You will receive rainbow glasses, and Theatre of Science magazine whenever I've written it. I'll also post you some past magazine so you've got plenty to keep you going until the new one arrives!

• Rainbow glasses, a description of how they work, three magazines when you sign up and the latest issues of Theatre of Science magazine through your letterbox!