I'm in my second tech job now, and had a 7 year gap between them to have dd3 and ds. Being a school science technician is a lot like being a Mum - you spend most of your time clearing up other people's mess and making sure they've got everything they need for the next lesson / day. Combine that with plenty of washing up, occasional cooking, bit of fixing stuff and you're most of the way there. Biggest skills needed are the ability to prioritise and manage your time effectively. Also need to be able to stand your ground when presented with unreasonable last minute requests. Being part mind reader helps too as teachers don't always give too much away with their equipment requests.
Both times at interview I've been asked how I'd deal with a last minute request for equipment. Answer is that it depends on how busy I was and whether giving out the equipment would impact on another class later on, but if possible I'd give them what they needed, perhaps only one set as a demo though.
Also need to be able to guess a bit - e.g. if they've asked for bunsens, tripods, gauzes etc they rarely remember to ask for splints and matches, but it's a pretty good bet they'll be needed too, so I always put them out on the trolley. So it's really helpful to understand what the equipment is being used for and what the point of the practical is, as then you can send out what's needed rather than just what's asked for.
Being flexible about hours you can work can be helpful too, e.g. for open days, extra training, assessed practical times etc you might need to work extra or different hours. Knowing that you've got a plan for odd extra childcare if needed would be helpful. These situations are normally known about months in advance, so you'd have time to get something sorted.
There are courses technicians can go on either as beginners or specialist subject courses. I've also done first aid training which was a condition of employment for my current job.
I've also been asked at interview...
-how to make up a standard 1M solution
-how I'd deal with situation where I thought a pupil was being bullied
-whether I'd be willing to go into classroom to help with praticals
-whether I'd be happy to talk through practicals with staff members (we're a middle school and for the year 5 and 6 teachers they're not science specialists and sometimes need a bit of extra explanation)
sorry for epic post! happy to answer any more questions if you've got them :)