Cyfres Cymeriadau Difyr: Stryd y Rhifau - Sara Sero

Dyma lyfr stori i blant 3-5 oed am y cymeriad Sara Sero. Mae'n canolbwyntio ar y rhif sero, ac yn gymorth i hybu adnabyddiaeth plant o rifolion penodol mewn ffordd hwyliog a chyffrous

Here is a story book for children between 3-5 years old. The book introduces the number zero, and focuses on helping children to recognise numerals by using fun and exciting methods.