Einstein's Letter Block Puzzle

Albert Einstein is the founder of the Theory of Relativity and is considered the most important scientist of the 20th century and of all time. The impact of Einstein's discoveries regarding the nature of space and time continues to be a central subject of scientific research in physics, cosmology, and mathematics, while his surname is often used as a designation of high intelligence. His theories were essentially a profound revision of the old Newtonian Physics and were a revolution for scientific and philosophical research.
Professor Puzzle puzzles honor Albert Einstein with a new series of metal and wooden puzzles, each based on the theories of the leading scientist.

Einstein's Letter Block Puzzle

Albert Einstein, according to TIME magazine in 1999, was declared a personality of the 20th century. The wooden pieces make up the name of the famous scientist. But can you solve the remaining 12 challenging tests asked by the puzzle? Start with the simple tests and try the two most difficult ones, the Relativity puzzle and the Quantum question!