​Stwnsh Sadwrn 'Mwy neu Lai?' game rules

To enter the competition:

You must provide your name, email address, your age and phone number on the STWNSH SADWRN website, or phone on 08000 727877 or text SADWRN along with your name to 80800.

The players for Mwy neu Lai will be chosen at random from all names who have competed.

To play the game, the players must choose if the object is larger or smaller than the previous one. This game is played over the phone, the player who is on the line with the presenters at the end of the game wins.

Entries must be made by those aged 16 years or younger. Before competing by phone, please ask the bill payer's permission. Calls from landlines are free but there could be a charge from a mobile. Contact your service provider for confirmation of your charges.

By entering the competition entrants agree that should they win the competition, their name and photograph may be used by Boom Cymru / S4C for promotional purposes.

There is no cash alternative for any prizes.

Boom Cymru and S4C takes no responsibility for any error, omission, interruption, deletion, defect or delay in any communication method used by entrants or for entries that have not been received before the closing date. Proof of sending e-mail cannot be accepted as proof of delivery.

Boom Cymru and S4C reserves the right to amend these terms and conditions or to cancel, alter or amend the competition at any stage due to events beyond its control.

S4C and Boom Cymru will only use entrants' personal data for the purpose of administering the competition and will not use such data for any other purpose.

This competition is subject to the laws of England and Wales.

This competition is organised by and the promoter is Boom Cymru, Gloworks, Ffordd Porth Teigr, Cardiff, CF10, 4GA, and any queries or complaints about this competition should be addressed to S4C Viewers' Hotline at 0370 600 4141.

The competition is open to all except for S4C staff, Boom Cymru TV Cyf. (the Company) staff, their immediate families and companies directly involved with this competition.