I really love the film Hoverbike for imaginary settings - it is free to download on pocketmovies. If you put hoverbike animation into google you should find it. I intend to write a teaching sequence onto my website http://emmarogers.org.uk/literacy-planning-texts/ with it soon - but sorry I haven't done it yet and might be too late for you! But there are 2 Y4 units up so far - take a look www.emmarogers.org.uk There is also a photo in the gallery of a display a teacher did for Egyptians. The children all had torches and were able to peer into the shoe-box-pyramid and glimpse the artefacts, which led to some great recount writing based on Howard carters diary. I think most people use the Time travellers cat by Julia Jarmen http://www.amazon.co.uk/Time-travelling-Cat-Egyptian-Goddess/dp/1842705210/ref=sr_1_11?s=books&ie=UTF8&qid=1315673187&sr=1-11 as a novel.