Math on the Beach
Sunday at the beach, Simon was reenacting the 5 doors and a cat puzzle (he had learned this puzzle from the Mind Your Decisions channel). The puzzle is about guessing … Continue reading Math on the Beach
Category: Together with sis
Vladimir Krasnoukhov at MathsJam Antwerp!
When we arrived at the MathsJam last Tuesday, we heard a couple of people speak Russian. One of them turned out to be a well known Russian puzzle inventor Vladimir … Continue reading Vladimir Krasnoukhov at MathsJam Antwerp!
Active time in Friesland
Simon loved our Easter weekend in Friesland, canoeing and taking boat rides together with his grandparents. He also did some experimenting with the splashing waves and learned how to use … Continue reading Active time in Friesland
Chemistry Experiments: Polarized light iridizes crystals
Today we have made beautiful rainbow chrystals! Polarized light iridizes sodium thiosulfate crystals, so we made the crystals in between two polarizing films and then observed them through the microscope. … Continue reading Chemistry Experiments: Polarized light iridizes crystals
Physics Experiments: Double Slit
We have wanted to do the Double-Slit experiment for a long time. Finally, last Friday, armed with a suitable box, we ventured outside. To our common disappointment, light just wouldn’t … Continue reading Physics Experiments: Double Slit
Physics Experiments: Making Holes in Soap Membrane
This demo is inspired by a recent video on Steve Mould’s channel. It’s about creating a movable hole in soap film with a loop of cotton thread (the photo shows … Continue reading Physics Experiments: Making Holes in Soap Membrane
Simon teaching Neva
Some false proofs with infinite sums and infinite fractions:
A Fun Fibonacci Puzzle
Here is a fun math trick! Simon and Neva have made a 8 x 8 cm square (with an area of 64 cm²) and cut it into four pieces, turning … Continue reading A Fun Fibonacci Puzzle
Happy Pi Day 2019!
Just like last year, Pi Day activities are going to spill over to the next few days, I’m sure. Simon’s not yet done working on a Pi piano composition and … Continue reading Happy Pi Day 2019!
Valency
This is Simon explaining valency of fluorine and silicon to Neva (inspired by the Veritasium channel).
MEL Chemistry Experiments: Making Batteries
We did two more experiments a couple days ago: Liquid Wires (creating a simple circuit using graphite and liquid glass, a sodium silicate solution) and making our own Zinc-Carbon Battery, … Continue reading MEL Chemistry Experiments: Making Batteries
Geeks out of the box 