I stumbled across these door decorations from Finland on Etsy.
If you're prone to being swayed by interiors trends (guilty) you might be thinking: wall-stickers, aren't they a bit 2011? Pah. Just try to think of trends while looking at these nice, friendly faces.
The vinyl stickers are made and sold by a little Helsinki-based company called Made of Sundays and cost around £28 each. What