Day 1.319: A little magic

I know many of you have wondered how we make all our amazing Magnatile creations. Here's your answer - it's easier than you might think as you can see. If we'd had more time Exile #3 and I would have filmed this tower for longer!

Talking of answers (as I was a sentence or two ago) - I nearly revealed the answer to the mystery photo quiz today - anyone want to make a witty comment or a serious suggestion before I do so?