I need ideas for tomorrow! help!

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My husband was supposed to go and teach my daughters class about roman forts tomorrow but he's been called into uni for the next two days. I got volunteered in his place. Oh yay. I have talked with the teachers this afternoon and they agreed that i could use some roman artifacts i have dug up myself in a mock archaeological dig, sort of like a deranged time team dig lol. I was just wondering (hoping and praying too) if anyone has any other ideas that i can use to keep the class entertained or is there other ways i can expand on my 'dig' idea? any help and advice is much appreciated!