We had to solve clues and located steam trains and trams and found out how people used to travel many years ago.
The clues also took us to the Odyssey Centre and the town centre and we saw a giant fish which was made from tiles covered in newspaper articles.
Finger tips
Using technology in this way is brilliant - it makes communicating so much easier.
Everything is at your fingertips and you can find out things fast.
From this experience, I hope to make new friends. You make new friends who come from different parts of Ireland.
Great fun
I also hope to learn how to use new technology better and the phones have been great for that.
I would like to thank the Childnet staff and all the teachers for organising this.
I'm having great fun."
Jamie, 14, Dublin
Find out more about the Childnet Challenge by clicking the link on the right side of this page.
Why don't you write us a Press Pack report - and get it published on the site?!
It can be about anything that's happened in your local area - or your views on the news.
Mobile phone safety quiz
How to write YOUR report!
