The sick bags are a must.
And not just one either and prefferably with a freezer bag inside as a lining. The art of folding a chart into something which will hold puke while flying an approach is unfortunaly sadly lacking from all private and commercial training.
The reason for more than one is they tend to sit for ages folded up and when 2 litres of burger and chips with a pint pint of coke hits the bottom, it tends to leak. On no account let pax try and barf out the window even if its a Cessna where the window folds right up to the wing. All it does is atomise and spray paint the whole of the cockpit/ back of the plane including all surfaces infront of the pax.
And they are no use whats so ever in your flight bag. After one memorable day I started carrying one in the pocket in the back of my knee board. You really don't want to be hunting for one when the need arises. You have less time to deal with a sick pax than you do with an engine failure.
PS your not that bloke who was on the TV fly on the wall prog of a flying school are you. I seem to remember he had a teddy with him as well and always gave it a full pax brief before departure. And when on X-countrys chatted away to it as if it was the instructor.