Blwch yn cynnwys 18 pecyn o gêmau, 6 dis a chownteri = Box contains 18 packs of games, 6 dice and counters.
Gemau gwyrdd : casgliad o gemau mathemategol i gyd-fynd â gwaith Mathemateg Cynradd Caergrawnt, modwl 6. ISBN 1857871421. Published by Canolfan Astudiaethau Iaith in 1995. Publication and catalogue information, links to buy online and reader comments.