What would you do - child shows up at snack time

[flowerchild]

Or how about when mom shows up few minutes before afternoon snack to pick up child earlier around 3pm, asks if they've had snack. I say not yet, then she says I can wait... I have to deal with all the snackers while shes waiting in front foyer. Don't really want to invite her in...but don't want to be rude

Put the snack in a bag and they can take it to go.