Just a few words on the Egypt offshore reefs (Brothers and Daedalus) and diving with beginners/kids: The weather conditions there can change very quickly, like in the mountains. It is possible that there is little wind, no waves and zero current, like in a pond. People that encounter such conditions on a single or a few visits may believe that the recommendation that BDE is only for advanced divers is a joke. It can, however, also be the opposite. E.g. last October we had very strong and fast currents at Little Brother and on some parts the downwards current was so strong that the airbubbles were going into the deep instead of upwards.
You do not want to expose your kids to such conditions, although the chances that you have good conditions are better than the chances to have these taff conditions (I told my two children by myself ho to dive, when they were 12 years old, so I know a little bit)...
In addition, especially in autumn (but in principle the chance to encounter them there exists all around the year, but is smaller), oceanic whitetip sharks are frequently encountered at the offshore reefs BDE. While these sharks are not regarded to be extremely dangerous (but they are not reefsharks!), they have a unique, investigative, behaviour that is not to the tase of every diver, and maybe not for children.
Before booking a Safari definitely I recommend that you contact the Safari boat by EMail in advance, tell them the age and level of experience of each participant and ask about the route. A special "family or kids Safari" as is offered by e.g.
Deep Blue Cruises - Family Safari would be the optimum for the entire family...
Better to make an easy Safari first and everybody is happy than the opposite. When booking the second Safari everybody is already more experienced and you know what to expect...
Wolfgang