I used to (and still do) timetable it into guided reading. It can be quite noisy, but not too bad if you set out expectations. Also at the end of the time I'd pick someone at random to say what they had done/ show their work/ re-tell part of the story so they knew they had top do the work. Now I'm back in KS1 it is easier to timetable it (sometimes) into maths/ english/ non-core times, depending on the lesson. Also it gets used if there is free play/ wet breaks. The Egyptian one sounds good - you could spend time with children building tomb, ceremony in tomb and then later discovering the tomb. Or borrow a tray and sand from EY & have small world play too!