Decode a secret message written in hieroglyphs, then create your own.
mummify one of the team (not literally obviously) but go through the process necessary. and act it out.
Design some egyptian jewellery.
depending on your weather, create a sun clock in your playground using a stick and chalk.
find some pictures on ancient egyptian artifacts on the Internet and ask the class what they think they were made for. you can include a shabti, a toilet seat, found in deir el medina, a ostraca. statue of a god such as bastet the cat god. a sistrum.
play a game of senet. have a look at this web site to help
http://www.ancientegypt.co.uk/ the chapter life tells you how to play sennet.
work out some maths using ancient egyptian number signs.