hi last year my dd only had the 2 minders & i got small hand cream sets for each of them with a box of sweets for the creche.
This year however because she has changed rooms and still interacts with previous minders(they take her from me in the mornings) etc i just can’t buy for all so we made homemade cards for each of the main minders she has had this year & i’ll give a box of nice sweets & bottle of wine to go into the "box" – most creches put gifts into a box and split them between on the last day.
the idea of contribution to xmas night is a good one too, i know one of the mammies did that in our creche