Tickets

I have never been a great collector of tickets, programmes or memorabilia but this could be set to change after keeping the tickets from the famous tourist attractions in Egypt.  The authorities have produced some elaborate designs for their tickets that include holograms, this is to prevent forgeries.
I have found out that my English students are also non-collectors.  During one vocabulary lesson I had to explain the word 'scrapbook', not the easiest word to define.  Why would anyone want to keep scrap, especially old ticket stubs and plane tickets?  The Egyptian tickets helped me to explain that they would be a memento from my time in Cairo.  What's a 'memento'?  It's something you put in a scrapbook!  P