Efraim's and Menasze's six siblings included Józef, the oldest, who was also a painter and Hirsz, who was younger and was a sculptor.

Thereafter, they became students at the Academy of Fine Arts in Warsaw, where they belonged to the elitist group "Four" set up by the Rector Tadeusz Pruszkowski.

remembers that the twins enrolled in school as one student, paid one fee, and took turns attending classes.

During World War II and the Nazi occupation, the Seidenbeutels were confined within the Białystok Ghetto where they worked at the House of Art in the army.

The secret is that after agreeing on a desired hairstyle one of them enters the salon and, sitting back in the armchair, gets a hairdresser to cut his hair as he becomes absorbed in reading an illustrated magazine.

After a gorgeous haircut is done, with hair gel and eau de cologne added, he makes a payment, not forgetting a tip, and he leaves the salon.

Not ten minutes pass by when, outraged, he comes back to make a big hassle saying that the hairdresser only gave him a slight comb and didn’t lift a finger to cut his hair properly.

The owner of the barber's is terrified and asks him for forgiveness; and tells him to be kind enough to take a seat in the armchair once again so that he can make up for his mistake.