Carroll and Tober gained attention within esoteric circles for their concept of [[indigo-children]] set up in 1999. These children are said to be recognized by their blue [[aura]]. This term describes children with alleged special medial and spiritual abilities whose numbers allegedly have increased since the 1970ies. The invention of the [[crystal children]] also is said to go back to Lee Carroll. The concept of indigo and crystal children meanwhile is spread by many authors and providers on the [[esotericism|esoteric]] and [[psychic]] market. [[Jan Udo Holey|Jan Udo Holey alias Jan van Helsing]] also took up the issue.<ref>http://www.amadeus-verlag.de/product/1_42_Spirituelle-Ratgeber/15_Die-Kinder-des-neuen-Jahrtausends.html (german)</ref>
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Carroll and Tober gained attention within esoteric circles for their concept of [[indigo children]] set up in 1999. These children are said to be recognized by their blue [[aura]]. This term describes children with alleged special medial and spiritual abilities whose numbers allegedly have increased since the 1970ies. The invention of the [[crystal children]] also is said to go back to Lee Carroll. The concept of indigo and crystal children meanwhile is spread by many authors and providers on the [[esotericism|esoteric]] and [[psychic]] market. [[Jan Udo Holey|Jan Udo Holey alias Jan van Helsing]] also took up the issue.<ref>http://www.amadeus-verlag.de/product/1_42_Spirituelle-Ratgeber/15_Die-Kinder-des-neuen-Jahrtausends.html (german)</ref>