Ihram-clad Malaysian Muslim boys from the Little Caliphs kindergarten circumambulate a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Hijab-clad Malaysian Muslim girls from the Little Caliphs kindergarten circumambulate a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Hijab-clad Malaysian Muslim girls from the Little Caliphs kindergarten circumambulate a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

A Malaysian Muslim girl from the Little Caliphs kindergarten, clad in white hijab which is the traditional attire for Muslim women performing the Hajj pilgrimage, holds mock stones made from papier mache before performing the ritual of stoning the devil during an educational simulation of the pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Teachers from the Little Caliphs kindergarten help pupils properly wear their white ihram, the traditional attire for Muslim men performing the Hajj pilgrimage, ahead of an educational simulation of the pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

A Malaysian Muslim boy from the Little Caliphs kindergarten checks the order of religious rituals on a booklet before performing a simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Hijab-clad Malaysian Muslim girls from the Little Caliphs kindergarten pose and gesture while holding their mock passports after completing an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

A Malaysian Muslim girl (L) from the Little Caliphs kindergarten, clad in white hijab which is the traditional attire for Muslim women performing the Hajj pilgrimage, high-fives her teacher after completing an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Little Caliphs kindergarteners Naazhim Norhisyam (L) and Nur Hana Arissa Khairul Soffy (R), both 6, pose while holding their mock passports in front of a model of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

An ihram-clad Malaysian boy from the Little Caliphs kindergarten goes in search for a drink of water as other pupils (background) circumambulate a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Malaysian Muslim children from the Little Caliphs kindergarten clad in white hijab and ihram - the respective attire for Muslim women and men performing the Hajj pilgrimage, collect mock stones made from papier mache before performing the ritual of stoning the devil during an educational simulation of the pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Ihram-clad Malaysian Muslim boys from the Little Caliphs kindergarten rest while circumambulating a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Hijab-clad Malaysian girls from the Little Caliphs kindergarten circumambulate a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Ihram-clad Malaysian Muslim boys from the Little Caliphs kindergarten rest while circumambulating a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN

Malaysian children from the Little Caliphs kindergarten circumambulate a mockup of the Kaaba, Islam's most sacred structure located in the holy city of Mecca, during an educational simulation of the Hajj pilgrimage in Shah Alam, outside Kuala Lumpur on July 24, 2017. Thousands of Malaysian children took part in a practice run for the Muslim hajj pilgrimage on July 24, walking round a model of the holy Kaaba shrine under the tropical sun. The hajj is one of the five pillars of Islam, which capable Muslims must perform at least once, and marks the spiritual peak of their lives. / AFP / MOHD RASFAN