Yn Oriel y Ddinas, roedd y plant yn dringo allan o'r bws ysgol, eu llygaid yn brwd wrth iddynt gofio am y diwrnod blasus a'i addewidion.

In the Oriel y Ddinas, the children were climbing out of the school bus, their eyes eager as they remembered the exciting day and its promises.

Roedd dail brown a melyn yr hydref yn swnio tan draed wrth iddynt fynd tuag at y drws mawr.

The brown and yellow autumn leaves crunched underfoot as they headed towards the big door.

Ymhell ar y blaen, cerddodd Carys gyda'i ffordd gyfarwydd; roedd yr Oriel Naturiol yn lle cyfarwydd iddi.

Far ahead, Carys walked with her familiar gait; the Oriel Naturiol was a familiar place for her.

Roedd hi'n gwybod sawl peth am ddinosoriaid a hanes y ddaear.

She knew a lot about dinosaurs and the history of the earth.

Roedd ei breuddwyd am astudio archeoleg yn tanio ei hangerdd.

Her dream of studying archaeology fueled her passion.

Ond yn sownd rhywfaint yn ôl, cerddodd Emrys.

But lagging somewhat behind, Emrys walked.

Roedd yn edrych o gwmpas, ansicr.

He looked around, uncertain.

Nid oedd yn teimlo'n gysurus, yn enwedig gyda'r prosiect oedd angen ei gwblhau yma.

He didn't feel comfortable, especially with the project that needed to be completed here.

Roedd ganddo brofiadau o deimlo braidd yn annigonol mewn gwaith ysgol.

He had experienced feeling somewhat inadequate in schoolwork before.

"Carys!" galwodd Emrys arni, yn ceisio cyrraedd ei ochr.

"Carys!" Emrys called to her, trying to catch up to her side.

Roedd Carys yn stopio a'n gwenu arno.

Carys stopped and smiled at him.

"Helo, Emrys. Barod i fynd ar antur?"

"Hello, Emrys. Ready to go on an adventure?"

Noddodd Emrys yn betrusgar.

Emrys nodded hesitantly.

"Rhaid bod hynny'n hwyliog gyda'r un gwybodus fel ti," meddai'n llawen ond gydag ansicrwydd.

"That must be fun with someone knowledgeable like you," he said cheerfully but with uncertainty.

"Felly, gweithio gyda'n gilydd?" awgrymodd Carys.

"So, working together?" suggested Carys.

Yn eistedd ar fainc ger y sgerbwd mawr o ddinosaur, cafodd eu prosiect ei ddechrau.

Sitting on a bench near the large dinosaur skeleton, their project began.

Wrth iddyn nhw weithio, ychwanegodd gwybodaeth Carys haen o frwdfrydedd i'r prosiect.

As they worked, Carys's knowledge added a layer of enthusiasm to the project.

Yna, roeddent yn cerdded tuag at yr adran enfysol lle roedd hen fosiliau'n cael eu harddangos.

Then, they walked towards the vibrant section where ancient fossils were displayed.

Wrth fynd heibio i un o'r gwydro danbryd, gwaeddodd Carys yn sydyn.

As they passed one of the glass cabinets, Carys suddenly shouted.

Roedd y ddau wedi dod ar draws fosil unigryw, yn ymgorfforiad o rywbeth a oedd efallai'n anhysbys i'r curaduron hyd yma.

The two had come across a unique fossil, an embodiment of something that perhaps was unknown to the curators until now.

Daeth eu hathro, Mr. Evans, atynt wrth glywed yr hysteria cyffrous.

Their teacher, Mr. Evans, came over to them when he heard the excited commotion.

"Beth ydych chi wedi ei ddarganfod, chi dau?" gofynnodd gyda churiad ei galon yn cyflymu, tra'n edrych ar y darganfyddiad a oedd wedi taro'r ddau ddisgybl.

"What have you two discovered?" he asked with his heart racing, as he looked at the discovery that had startled the two students.

Chwilio'n ofalus, dechreuodd Mr. Evans wenu yn ehangach.

Examining carefully, Mr. Evans began to smile more broadly.

"Wel, bydd hwn yn ychwanegu rhywbeth arbennig iawn i'r arddangosfa," meddai'n bendant.

"Well, this will add something very special to the exhibit," he said confidently.

Roedd Emrys yn edrych at Carys ac yna i Mr. Evans.

Emrys looked at Carys and then at Mr. Evans.

Am y tro cyntaf ers amser maith, teimlai Emrys yn falch o'i gyfraniad.

For the first time in a long while, Emrys felt proud of his contribution.

Ei gwenu'n pefrio wrth glywed y geiriau.

His smile sparkled at hearing the words.

Mae'r diwrnod yn dod i ben wrth i'r plant gasglu at eu hunain.

The day wrapped up as the children gathered themselves together.

Roedd y gôl ar ben Emrys yn deimlad o hyder newydd.

The glow on Emrys's face was a feeling of newfound confidence.

Er nad oedd yn arbenigwr mewn dinosauriau fel Carys, roedd wedi profi iddo'i hun ei fod yn gallu cyflawni pethau mawr.

Though he was not an expert in dinosaurs like Carys, he had proven to himself that he could achieve great things.

Wrth iddynt gerdded tuag at y bws, sylweddolai Emrys ei fod yn fwy agored i brofiadau newydd.

As they walked towards the bus, Emrys realized he was more open to new experiences.

Teimlodd nerth newydd i gofrestru am fwy o gyfleoedd.

He felt a new strength to sign up for more opportunities.

Roedd dysg Carys wedi rhoi iddo fwy nag unrhyw-athro arall.

Carys's knowledge had given him more than any other teacher.

"Gad i ni wneud hyn eto," meddyliodd Emrys gydag ymdeimlad o bwrpas clir, gan ddal dail a oedd yn disgyn wrth iddo fynd.

"Let's do this again," thought Emrys with a sense of clear purpose, catching falling leaves as he went.

Roedd hydref wedi newid Emrys, a newydd gychwyn ei stori newydd.

Autumn had changed Emrys, and a new story had just begun.