Third book in this laugh-out-loud series, suitable for 9 years+ KS 2 and 3. Seeing Delia without her sunglasses on is a big shock for Tom, but that's nothing compared with the surprise that Dad has in store with his new-found fitness regime! He says he's going to compete at the school Sports Day. Can you even imagine the horrendous shame that will bring?

Dyma'r trydydd teitl mewn cyfres ddifyr ar gyfer darllenwyr 9+ oed. Caiff Tom syndod mawr pan wêl Delia heb ei sbectol haul, heb sôn am weld ei dad yn ei ddillad cadw'n heini, a dyna roi cychwyn ar helbulon Twm. O'r fath gywilydd! Addasiad Cymraeg gan Gareth F. Williams.