For the 4yo , it's about settling them and a nice wind down , a few nice things to do.
I used to put ours by the fireplace when we took our two out ( "I'm just going to check the back door is locked "...... while DH got them into the car)
Bath bomb
Hot chocolate sachet
Small pack of mini biscuits
PJs
An annual when they were old enough
Jar of sweets each ( I bought a Kilner jar and put their favourites in)
Your baby could have a bottle of nice bath bubbles and your older DC could 'help' ?
A bath toy or flannel?
My DC had their Hampers yesterday , we started doing Dec 1st a few years ago. DS is nearly 20 and DD is 17 , their PJs are more £ now and 'winter' ones , so they get more use .
I bought some Sainsburys white with tiny navy reindeer for DD , Primark plaid for DS .
I love the CEH, it's things you'd give them anyway , not a load of "more presents?" eyeroll . And it doesn't need to be plastic tat .
I did Reindeer Food once . I put sugar and food colour in a sealed box, shake to colour it . Once dry , added porridge oats . Some edible gold stars . Popped in a bag each , with the intention of scattering on the lawn.......it sat there , uneaten (by the reindeer or the birds) like pink vomit . I cleared it up after I realised it would just sit there .
Tea lights (either candle or battery candles) in old jars lining the path (to guide the sleigh)
If the Space Station orbits that is lovely ( it is silent , with lights)
And the tray for Father Christmas . DD had a tea set from Ikea ( tiny cups,plates,tea pot , milk jug , sugar bowl and spoons)
She made toast , with jam and the tea pot was 'magic' so kept it hot . (Of course I had to take a bite and use the cups before bedtime) . Our reindeer liked pistachio nuts rather than carrots 