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Drone Repair & Tune-Up Service
Props chipped? Gimbal wobbling? Camera fogged? Bring it in. I fix DJI, Autel, and FPV builds. Diagnostics free, parts at cost, labor EUR 40/hour. If your drone hit a seagull, add EUR 20 for the therapy I'll need after seeing the footage.
Nespresso Citiz (Backup Machine)
My backup Nespresso Citiz. For when the Linea Mini is rented out or when I can't be bothered to grind beans. Makes a decent espresso in 25 seconds. Pod machine -- not for purists, but perfect for mortals. Comes with a starter pack of 50 capsules.
Science for Young People -- The Christmas Lecture
A demonstration-rich science talk designed for children and teenagers. I started the Christmas Lectures at the Royal Institution in 1825. Fire, ice, magnets, sparks, bubbles -- real science made visceral. No equations. Just wonder. The Chemical History of a Candle -- six lectures explaining all of chemistry through a single burning candle.
Physics Problem-Solving Tutoring
One-on-one tutoring in physics. Any level, any topic. I spent 10 years as a professor. The secret to teaching physics is this: never start with the formula. Start with the question. Why does this happen? What would you expect? Now let's check. The formula is just the shorthand for the understanding.
Violin (German Make, 1920s, Concert Quality)
My violin. Well, a replica of my favorite one. I named the original Lina. Mozart and Bach -- that's what I play when I'm stuck on a physics problem. The music reorganizes my thinking. If you can play, borrow it. If you can't, I'll give you a beginner lesson. Badly. I'm a better physicist than violinist.
Compass (Pocket, Brass -- Like the One That Started It All)
Brass pocket compass. When I was five years old, my father showed me a compass. The needle moved without being touched. Something invisible was acting on it. That moment -- the mystery of the invisible force -- started everything. Give this to a curious child and watch what happens.
Tabletop Printing Press (Working Replica)
Working replica of a 15th-century screw press, scaled to tabletop size. Wooden frame, iron screw, leather ink balls. Comes with a starter set of lead type (Textura blackletter) and oil-based ink. Print your own pages. The same mechanism that ended the Dark Ages, now in your kitchen.
Radiation Science Workshop -- Safely Understanding Radioactivity
Two-hour session with safe demonstration materials. Cloud chambers to see particle tracks, Geiger counters to measure background radiation, mineral samples that glow under UV. You'll understand alpha, beta, and gamma radiation and why each behaves differently. Tip: Radioactivity is natural. You're surrounded by it. The banana you ate this morning was radioactive. Fear comes from ignorance. Understanding comes from measurement.
Cloud Chamber (Wilson Type, Desktop)
Desktop cloud chamber that makes radioactive particle tracks visible. Pour in isopropyl alcohol, cool the base, and watch cosmic rays and natural radiation leave vapor trails in real time. It's like seeing the invisible forces that pass through your body every second. Mesmerizing and educational.
Lead Type Set (Textura Blackletter, Complete Alphabet)
Complete alphabet in Textura blackletter -- the typeface of the Gutenberg Bible. Upper and lower case, numbers, punctuation. Cast in traditional type metal (lead-tin-antimony). Each piece hand-finished. Handle with care; lead is toxic. Wash your hands after use. I didn't know that part.
Plains Horseback Riding -- Bareback & War Pony
Bareback riding on the open plains. No saddle, no stirrups -- just you and the horse. The Lakota were among the finest horsemen on Earth. Knee signals, voice commands, shooting from horseback. Tip: The horse must trust you before it will carry you into danger. Earn the trust first.
Chivalry & Diplomacy Seminar -- The Warrior's Honor
How to wage war without losing your humanity. Prisoner treatment, negotiation under pressure, trust with enemies. I sent Richard ice when he had fever. He sent me horses. We tried to kill each other for three years and parted with respect. Tip: Your reputation arrives before your army.
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