I have always been interested - indeed, waylaid - by the leading edges of technology, even during my Ph.D. years when I pioneered (but did not publish) agarose gel electrophoresis for RNA fractionation. Also, much later, I was instrumental in showing that Green Fluorescent Protein and RNAi could be made to work in mammalian cells.
When I try to think back to my favourite toys, books and activities, I do see now that perhaps I did naturally become a scientist. I made pressed flower collections at about the age of eight; later I learned about wild orchids and became adept at finding all the species in Kent. I loved old science books, e.g. 'Moving Things for Lively Youngsters.'