If you could bring back one dinosaur, which one would it be?

Dinosaurs! weโll bless my soul.
Thatโs a difficult one!
The best ones green and plastic
And made for five year olds.
Mostly they grow out of them
Before theyโre seven or eight
Iโd like to show more interest
But Iโve left it rather late.
Iโm an ancient fossil
A dinosaur myself
Living in the distant past
And practically extinct.
Iโd like to write of aurusis
triceratopy things
But much too old
To learn that stuff
And really not my thing.
I reached for my thesaurus
More my kind of thing
But it really wasnโt too much help
So nothing more to bring.