Swiss army knife: Indispensable item when camping and hiking!
Muse headband: Neuro-feedback device for meditation. Also fun gadget.
Factfulness book: Hans Rosling is one of the people who inspired me, with his emphasis on facts and positive view of the world.
Star Disk: Once amateur stargazer, then physics & astronomy as a study. The universe remains interesting.
Travel guide Ethiopia: Backpacking and learning about new cultures.
Thermos: Am never far away from a cup (or jug) of tea.
Chess pieces: Mediocre chess player, but always have a lot of fun with it.
Pickel: Alpinism. Fantastic combination of nature, challenge (both physical and mental) and tranquillity.
Climbing shoes: Originally started climbing, lately mostly bouldering.