Dec 3: Diabolo advent calendar

Day 3: Little more advance trick, the hand grind. Always love this trick and quite like switching position with the fingers (maybe for another day). If you are wondering if it hurts, no because the axel is a bearing keeping it only running in one direction. However if you are not careful, when your finger does rub against the side by accident it does burn and hurt.

Author: Ianforrester

Senior firestarter at BBC R&D, emergent technology expert and serial social geek event organiser.