A future development includes the creation of large housing complexes based on two inter-connecting modular units with the same side length: In cold climates, energy…
Merlin the magician has a magic box which plays tricks with light. He places mirrors in the box so that when a light beam enters,…
The newest puzzle craze, Sudoku, requires you to add numbers to a grid so that every row and every column and every 3×3 bold square…
You are the leader of a Scottish clan; either the McGuires or the McConnells. In preparation for war, you send out your envoys to demand…
King Arthur sits on his throne and broods. Stanley, his standard bearer has wandered off again – feasting his way through the kingdom from castle…
A fake karate brick looks like a regular brick, but when it is hit with a karate chop, it disintegrates. Sometimes people use these fake…
Cadmus handed Jason the sack of old dragon’s teeth and the Greeks stomped and cheered. Jason opened the sack and turned a tooth over in…
Janus is the Roman god of gates. He has a two-faced head because from each gate he needs to look in both directions. The first…
Injection molding is a technique for making a huge range of plastic objects like toothbrushes, fly swatters, and food containers. Molten hot plastic is injected…
In the valley in the heart of the dark wood lives a gloomy elf. His doorless home is painted totally black so dark that no…