I am attempting after dinner this year which is the first year really they will be able to go on about it (4 and 2) though they have had chocolate ones since the first christmas post-weaning (tho I ate most in the early years). But I suspect it will morph into when get home from school.
I did have vague ideas about only using the felt pocket ones with small fairtrade organic lentily weavery type trinkets in but I caved in when ds1 nearly wet himself at the shops the other day when he saw the "boxes with 100s and 100s of choclates in them to eat every day!". I did buy nice Thorntons ones tho as I hate the moldy old cheap chocolate ones that have been in a storage container in Taiwan for the last 4 years. I let him eat one of the extra chocolate ones today so the signs aren't good.
Oh and I have bought him a Playmobil one too which he can open in the morning - is he th emost spoilt kid on MN?