The children are every excited to see a string of little bags pinned up the stairs.
I bought the string and Christmas pegs in Poundland; they are supposed to be for cards. I needed two because there were 12 pegs in each packet.
I bought the paper sweet bags on ebay; they were just over £2 for 100.
Ours contain sweeties, but you could also fill them with small toys, crayons, erasers etc.
I'm hoping to have time to hand print some labels with the numbers 1 to 24, but no promises on that front!