Stuck in the Past?

I was talking to the Hubby recently about writing advice. I told him I'd noticed most advice says I should carry a notebook and pen around with me to write down ideas. This is good advice except for one thing, why does it have to be a notebook and pen?

I like to go for walks and throughout the summer, while the kids were off school, we took them for walks along the canal and through the countryside. It was really useful for me, it allowed my creative energies to flow. Carrying a notebook and pen was annoying.