Things for their room?
Do either like a particular programne/film? My dd started collecting funko pop figures around that age. They have them for practically everything!
Magazine/comic/geek box/roblox/baking subscription.
Dd1 loved beano, phoenix comic at that age.
Wireless headphones.
Squishmallow soft toy, dd loves hers for leaning on or snuggling on the sofa.
Fleece blanket.
Metal detector.
Telescope.
Go for an experience gift but wrap up a clue in a big box.
Games - my dd2 is 7, her favorites are jenga, exploding kittens, catventures, payday, game of life, scrabble, guess who, snakes and ladders, no more llamas. I have bought her a classic compendium, rush hour, ok play, junior colour brain for Christmas.
Baking/cooking Hamper- with fun cutters/moulds. I got dd1 stitch themed stuff from primark. She loves a biscuit or cake.
Milk Heater/frother was a massive hit last year, use all the time for hot chocolate. Wrap up with new mugs, marshmallows etc.
In the same token, waffle maker, popcorn maker, toastie maker (my dds got very excited when my sister gave us one!).