Don't forget to check out Luke's channel found here https://www.youtube.com/channel/UC1E8OmOG17VckoPviOPmkMw If you want to have a look at those special videos become a member and join by clicking this link null Don't forget that you can buy my books and materials for your own experiments including our conductive inks at https://secure.workingink.co.uk/working-ink-shop/ - and for the many who have asked, yes, you can also donate to further our work, again through the shop.