DD, aged 13 months goes to nursery. Another child there has an identical pair of shoes, and when her Dad collected her mid afternoon he took my DDs shoes instead of his DDs.
This Dad/ Mum won't bring them back until the child is there again on Monday. It doesn't bother them apparently because they have another pair of shoes they can use.
They would have had time too as it was mid afternoon they were taken. They are going away for the weekend which is why they can't return them, but they have only gone to Grandparents, it's not like they were catching a plane. 
In the meantime, my DD has to go without shoes.
I hope they are MN and read this.
Not Happy.