Best ‘on the couch’ device for sketching ideas?

[bibenu]

You may want to check this previous thread, with a couple of particularly helpful posts.

For me, it’s the MC-101. Battery powered, so just add headphones.

Favourite gear for Couch, Sofa, Lap

I’ve seen this subject discussed elsewhere but never a dedicated thread (at least, I couldn’t find one, mods please merge if I’m wrong). QUESTION: If you only have your lap to place gear, e.g. on the sofa, perhaps in the park on a bench, what’s your favourite gear in that situation ? Asking because I’m looking for useful tools for that situation. E.g. if I hear something musical on TV that interests me, the first thing I turn to is the nearest instrument to the sofa, which is always an instrum…