Question: What is the oldest age, in years, that Selim Zilkha's retailer caters to for children? 

Context articles: Selim Zilkha
Ieper Group
Tournaisian
Mothercare
Ukrainian Youth Football League
Selim Aga
Hesham Selim
Aquitanian (stage)
Ypresian
Danian

Selim Zilkha (born 1927) is an Iraqi-born British entrepreneur, who founded Mothercare, one of the UK's largest retail chains.
The Ieper Group (Dutch: "Ieper Groep" ; French: "Groupe d'Ypres" ) is a group of rock strata in the subsurface of northwest Belgium.
 The group is subdivided into three marine formations, all formed during the Ypresian, a single age of the geologic timescale (55 to 49 million years ago, the oldest age of the Eocene epoch).
 Both age and group are named after the West-Flemish town of Ypres, for which the Dutch name is "Ieper".
The Tournaisian is in the ICS geologic timescale the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous.
 The Tournaisian age lasted from round 5 Ma to round 5 Ma.
 It is preceded by the Famennian (the uppermost stage of the Devonian) and is followed by the Viséan.
Mothercare plc () is a British retailer which specialises in products for expectant mothers and in general merchandise for children up to 8 years old.
 It is listed on the London Stock Exchange and is a constituent of the FTSE SmallCap Index.
The Ukrainian National Youth Competition (Ukrainian: "Дитячо-юнацька футбольна ліга України", (ДЮФЛУ) ) is split into four (4) age groups which in turn has the Supreme and the First Leagues.
 The Supreme Leagues consists out of four regional groups and the First have eight.
 The competition's oldest age group has the teenagers who are no older than 17 years old and the youngest - the teenagers no older than 14.
Selim Aga (born around 1826 in Taqali area of Sudan, died December 1875 in Liberia), a native of Sudan who was abducted by slave traders when he was eight years of age, was brought to Scotland in 1836, and raised and educated as a free man.
 Selim wrote an autobiography of his life as a slave, accompanied by his poetic "Ode to Britain" and printed in Aberdeen in 1846.
 He regularly lectured in Great Britain on the African topics, and in 1857 left with William Balfour Baikie for an expedition of the Niger River.
 Later he accompanied John Hawley Glover and Richard Francis Burton on their African expeditions.
 In late 1860s Selim relocated to Liberia, probably aspiring for presidency; he was killed by Grebo insurgents in 1875.
Hesham Selim (Arabic: هشام سليم‎ ‎ ) is an Egyptian actor and the son of Saleh Selim.
 He has made many movies and television series since his childhood.
 He has been married twice.
 Mervat El Nahas was his first wife which is the mother of his three children.
 Nadia Al Ghaleb is his second and they have been together since 2004.
 He began his acting career at age 13 but took his schooling seriously and did not act again until he had graduated.
 He is the father of three children, (Noor Selim/ Zein Al Sharaf Selim/ Esmat Selim).
The Aquitanian is, in the ICS' geologic timescale, the oldest age or lowest stage in the Miocene.
 It spans the time between 23.03 ± 0.05 Ma and 20.43 ± 0.05 Ma (million years ago) during the Early Miocene.
 It is a dry, cooling period.
 The Aquitanian succeeds the Chattian (the youngest age of the Oligocene) and precedes the Burdigalian.
In the geologic timescale the Ypresian ( ) is the oldest age or lowest stratigraphic stage of the Eocene.
 It spans the time between  and  Ma , is preceded by the Thanetian age (part of the Paleocene) and is followed by the Eocene Lutetian age.
The Danian is the oldest age or lowermost stage of the Paleocene epoch or series, the Paleogene period or system and the Cenozoic era or erathem.
 The beginning of the Danian age (and the end of the preceding Maastrichtian age) is at the Cretaceous–Paleogene extinction event  Ma .
 The age ended  Ma , being followed by the Selandian age.