As with other Carnivals, many participants wear elaborate costumes, often decorated with feathers and sequins. Carnival bands are organized groups made up of participants who pay for costumes fashioned by a designer and assembled by teams of volunteers. The costumed participants dance through the streets to the sounds of a steel band, a soca band or a d.j. – this is called "playing mas'". A unique feature of this parade is that locals and tourists alike participate in the parade of bands. Each band is led by a King and Queen, who wear extremely large costumes, often requiring extensions and wheels to assist the masquerader to carry it through the streets. Each year on Dimanche Gras (Carnival Sunday), a competition is held to award the King and Queen of Carnival title to two of these masqueraders.
On Carnival Monday and Tuesday, the bands are in competition to win the Band of the Year title. Small monetary prizes are associated with these titles, though they do not cover the full amount of producing the band's music or the King's or Queen's costumes. Participation occurs at all levels of society; three-time calypso monarch David Rudder described it as "from bourgeois to grassroots." Children participate from as early as parents can get them into costume; sometime even strollers are decorated.
Children can extend their fun by participating in smaller "Kiddies' Carnival" shows, competitions and parades as early as 4 weeks before the culmination of the festival. For weeks ahead, several preliminary rounds of competitions and parties (or fêtes) take place. As Carnival is part of the national curriculum, several programmes take place at schools across the country. Regional authorities handle smaller Carnival celebrations in smaller towns and villages.
https://en.wikipedia.org/wiki/Trinidad_and_Tobago_Carnival 
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