An innovative Welsh business is proving that science is fun, not scary, with a series of weird and wonderful experiments as British Science Week gets underway. Caerphilly-based Letterbox Lab is setting out to challenge the way children view their environment and encourage them to carry out their own mini investigations with their clever all-in-one science boxes. And this year’s British Science Week theme of ‘Change’ is particularly fitting, as Letterbox Lab was founded last year by married couple Mia and…