Building robotic duck legs

[Nightshade]

Yup that's right.

I thought perhaps some of you creative types on here might have some ideas.

I need to build some robotic duck legs. They don't need to function, just stand up and support a fluffy toy duck. Preferably needs to be built for very little cost, with things easily available.

My first though was something along the lines of buggy bodies made from pop bottles - making 2 halves from sheet plastic and joining them together. But closer investigation shows I'd need some form of mould and probably a heat gun.
There's no reason they couldn't be solid, but no idea what to work with...

Anyone got a bright idea?