They remind me an awful lot of the adorable Takochus which I have seen cropping up on Flickr quite often on the photostreams of fellow toy enthusiasts. I don't actually own any Takochus (with a very big YET on the end of that sentence!) but from what I understand, stacking them is a balancing act, as they are made of hard plastic.
Doppelgangers are squishier and hollow, with a little hole in their bottoms so they can suction onto each other and stack in awesome ways!
I had to pop back today and pick up a few more just to take advantage of their stackability. Frailty, thy name is woman! To my credit, I did actually resist some beautiful Mini Lalaloopsys in Hamley's (but cancelled that out by picking up some Lego at Argos...)
My name is Alice and I have a problem with toys.
In other news, I have passed the 50 photo mark in my 366. One nice thing about doing a 365 is that I really do keep track of the year passing- i.e. every so often I notice how high the number is climbing and get in a bit of a flap at how fast it's going! Photo number 50 was my first little Doppelganger.
I like their slightly sinister expression. Especially appropriate as they seem like 'doppelgangers' of Takochus to me! I will need to get together a little Takochu gang, and a have Sharks/Jets type showdown. :P