What classes does Jolly Kingdom list for children?

Cambridge YLE is one of Jolly Kingdom’s school classes, and the company describes it as an English course for children. Trinity GESE is listed among Jolly Kingdom’s school classes, with the homepage indicating it is for students aged 4 and up. Jolly Kingdom offers 5 - Finger Kingdom™ Writing, listed for students aged 6 and up. Primary English is listed as one of Jolly Kingdom’s school classes. GoMath Kinder is listed among Jolly Kingdom’s school classes for children aged 3 to 6.