If anyone is still looking for something to occupy their Year 9 DCs in the Easter holidays I can recommend this CyberSecurity course on 14th-16th April which is run by the Smallpeice Trust (the engineering charity) in partnership with Royal Holloway University: www.smallpeicetrust.org.uk/course-page/c61c1ec0-624f-eb11-a812-000d3a8711b0
My older son did it a few years ago as a residential course, and really enjoyed it. My Year 9 son wanted to do it this year (it's online, which actually suits him better) but unfortunately he's now had to pull out because he has a clash with something else. I was told they still have some places left so I thought I'd give them a plug. It's £200, so not cheap, but they do have some fully funded places for people who meet certain criteria.