Dd found a toy around 9 months and now at 5 has moved onto a teddy just for bed.
Ds had a fleecy blanket around 16 months but I got him a smaller blanket with teddy head so i didnt have to cart around a big blanket.
I waited until they found something they wanted and once they are attached to it buy spares!!!
As for the teddy head blankets they have been around for years so i dont think its just a cute trend plus they are a good size for little ones.