Granpa and the steam train

Did you know my grandpa has a steam train, a bright and shiny one?
Every Saturday he drives it and takes children ever where, the train is
called Deirdre Jean after grandma of course and she is very proud of
that.
One day he was out on the steam train and Tristan and Martin his
grandsons where there to help him, now these too boys where very clever
being the same age 14 and quick witted too spotted that grandpa's
engine was smoking in an odd sort of way, more than usual if you know
what I mean. Well Tristan ran over to where Grandpa was chugging down
the track and he told him he saw the smoke. Martin followed quickly
after. They all put their heads together to see what the smoke
was&;#8230;
"Must be some dirt on the engine," said Tristan
"I agree" said Martin and they both got down on the dirty track and
started investigating, well Grandpa just stood with his hands on his
hips and smiled at the two boys, who by now where so dirty with the oil
from the engine. But they were right it WAS just dirt on the engine and
Tristan and Martin where very pleased with them selves.
"You both deserve a glass of pop" smiled Grandpa
Because they where so quick to spot a problem they certainly saved the
engine from further damage and was rewarded with the pop and a nice
long ride upon Grandpas steam train "the Deirdre Jean