The hero and the rocket.

In the park, he and the girl named Darcy launched a rocket. They at first could not get it to work but his mother had showed him how and he had remembered. The rocket took off and the girl smiled, " rocket hero!"
He just blushed.

What is better to start a story is an element of surprise. The rocket exploded into yellow electric stars and that was the end of it but the smiles shone on their faces.