Long haul flight with ADHD 8 year old advice please

At the end of the month we're flying from Australia to Switzerland via Singapore. The fight leaves at 6.30pm with an hour lay over in Singapore, so she'll be able to sleep for the first flight and hopefully with another dose of melatonin go back to sleep for the beginning of the Singapore-Zurich flight, but if you have any ideas to avoid boredom and under stimulation b meltdowns I'd appreciate it.

We're packing snacks, sticker books, drawing supplies, her Kindle, a couple of games, and a device, and she'll have the in flight entertainment. It's there anything I'm missing?