It’s all too true. Being a dinosaur would have been far more interesting career path for me, as would have being a choo-choo train astronaut (i.e. the pilot of a space train).
Luckily, while I’ll never be as cool (or ferocious) as my past self might have wished, the sentiment still makes a great conversation starter. You can get yours now over at Threadless in sizes ranging from X-Small to 3X-Large in a male or female cut for just twelve dollars. They all come in white.