Author: Casia Wiliam.

Jac y Jwc has come around to look after Jac Do while Sali Mali takes a walk with a friend. But Jac Do is worried. Jac y Jwc doesn't know what cup is Jac Do's favourite cup, or what his favourite lunch is, or where his toys are kept! Can Jac Do put his worries aside and have fun with Jac y Jwc?

Awdur: Casia Wiliam.

Mae Jac y Jwc draw heddiw i warchod Jac Do tra bod Sali Mali'n mynd am dro gyda ffrind. Ond mae Jac Do yn poeni. Dydy Jac y Jwc ddim yn gwybod pa gwpan yw hoff gwpan Jac Do, neu beth yw ei hoff ginio, neu ble mae teganau Jac Do yn cael eu cadw! All Jac Do anghofio ei bryderon a chael hwyl gyda Jac a Jwc?