Tech Day gets butterflies flapping

Butterflies were slugging it out in my stomach. Biff! Bang! Whallop! I was nervous. Our school hall had been transformed into a huge display of all the equipment and programmes we use in a digital school. It was the Tech Expo - at last! And I was one of the chosen helpers.
Every class had chosen a technology (like Easispeaks, green screen or 3D printers) to work with for a term. Knowing how to use the technology, creating examples of work and being able to describe how that technology helped our learning - that was our goal.
Like the rest of my class I practiced how to describe what a green screen was, and show how you used it to create the most amazing, and often funny, photos ever. We role played being an adult visiting the stall asking questions. One time Ms O'Connor came into the classroom during one of our practices. She joined in the pretending.
"Why does the screen have to be green? Could it be blue or red?" she asked. "Umm, urrr.....I..I..I'm not sure." I stuttered. "That's no good. You need to sound more confident," she said. "If someone asks you something you don't know, tell them you'll Google it! Let them see you know how to problem solve."
On hearing that the first butterfly began tip-toeing around inside me.
The expo was meant to be held last term. Big signs were painted up and Mr McPhun went round town knocking at people's houses asking if he could put a sign on their fence. Anyway the flood happened and the teacher said that circumstances meant we were putting it off till term three. I felt sorry for Mr McPhun when I heard that he had to go back to all those houses and take the signs down. The dates were changed on them then he had to put them all back up again!
So after the holidays we got back into tech expo mode. This time instead of practising what to do on each other, we demonstrated and explained to kids from other classes. Some were interested, some just played, and a few actually asked questions. The teacher had been watching us during the practices and chose the people who could talk clearly and be good explainers to be the stall helpers. I was chosen! But my one butterfly was joined by his friend and they stomped around inside me.
The day before the expo Mrs Larsen got all helpers together to give us our final instructions. We weren't just to sit in our stalls and wait for someone to come along and be interested, we actually had to go over to people, introduce ourselves, ask them if they would like to find out about whatever our technology was. The butterfly pair became a hip-hopping family.
Expo day arrived.The other helpers and I sat perched in our stalls staring anxiously towards the hall door...
THAT was when the butterfly war began!