It really doesn't get much easier than this. Get the kids involved and watch the glow on their faces when the birds start to roost. Preparation time: 5 minutes. Child decoration time: A lot longer (ah, bliss). Durability: A full season or even two.
Footprint Snowman Craft for Kids
Footprint Snowman Craft for Kids by FSPDT - is this not the cutest snowman ever!