preschool/kindergarten performance event
A school event where young children sing, dance, or perform short plays for parents and teachers. The honorific prefix お is part of the standard name.
See also: 遊戯 (ゆうぎ)
Next Saturday is my daughter's preschool performance event.
The children performed a cute dance at the preschool event.
Compound of honorific prefix お, 遊戯 (play, game), and 会 (gathering, event). The exact historical derivation is uncertain, but it is a conventional term for preschool performance events.