Registered playgroups, also known as pre-schools and play-schools can be run by community or voluntary groups, local authorities or privately. Playgroups open for morning or afternoon sessions only, for between 2 and 4 hours, up to five days a week. Most children in playgroups are aged between 2½ and 5 years. No meals are provided.

Most pre-schools have the same term dates as local schools and are open from Monday to Friday term-time only. Pre-schools usually charge a fee.

Playgroups allow children to play in small groups offering them lots of opportunities to learn through a wide range of fun activities. Children enjoy a safe and stimulating play environment and learn to develop socially, emotionally, intellectually and physically.

Playgroups can be a member of the WPPA (Wales Pre-school Playgroups Association). Cylch Meithrin aim to give every child, aged between 2½ and 5 years, in Caerphilly county borough, the opportunity to benefit from pre-school experiences through the Welsh medium. The emphasis is on education through play, as play is fundamental to all aspects of child development. Registered Cylch Meithrin's playgroups are open from Monday to Friday term-time only.

Cylchoedd can be a member of the (MM) Mudiad Meithrin, which is a national voluntary association of Welsh-medium playgroups.