Liz Pichon 
Cyfres Twm Clwyd: Esgusion Ardderchog (A Mwy o Stwff Da) 

Second book in this fun, new Twm Clwyd series. No school for two whole weeks leaves Tom with heaps of time for the important things in life. Yeah! Stuff like: inventing new ways to annoy his sister Delia and eating caramel wafers. Excellent! Crammed with scribbles, doodles, stories and mayhem. Suitable for readers aged 9 years+.