A bag / Small suitcase to fit all there clothes
A rucksack for personal items
Style / colours depending on age of the child
Afew soft toys, different textures. One small, one average size, Regardless of child age
Again depends on age of child but water bottle, snacks / Drinks
Sanitary products of different types but would stick to different sanitary towels
Waterproof mattress protector, one that isnt plastic, Bottom sheet, Spare duvet & duvet cover, extra pillows & pillow cases
A laundry basket with a lid in the room, so if they do have an accident, they can change the bed and ‘get rid of the evidence’ if they are embarrassed (And obvs you dont mention it and check the laundry bin everyday when they arent there/ in another room
Hopefully they would tell you but especially older children may not
Extra Blanket incase they get cold / Comfort item
A colouring book (age appropriate) & Pencil case, Note pad & Pens
Toiletries. Toothbrush, toothpaste, Deodorant, Body spray, Flannels, Towels etc
Night light / Side lamp - Ask them what they prefer
If they want the light on, door open etc
And whatever you buy them, make sure they know, its theirs forever now.
NEVER THROW ANYTHING OF THEIRS AWAY. EVER.
Even if it looks to small / Dirty /Worn etc
That item may be their only memory of their family / past