Always at least 1 books, often 3 or 4
A fruit bowl worth of fruit (red apple, green apple, orange, mandarin, kiwi etc), goes back to my own childhood. (The one time per year all DCs had our own supplies of fruit that we didn’t have to share with the other 5).
As DCs, a 1lb box of sweets (everyone different). Dd gets something nice that she’d enjoy (dark choc usually).
Some fun science stuff - crystal growing kit, bug viewer, slinky, ...
Nice hair bobbins, lovely shower gel, good socks that DM would never buy...(something you need, but nice versions).
And then fun stuff. Something you want. Craft things. Add ons to systems/kits/collections already started. Something to do with the latest craze. Etc.