There's apparently no marking on any of them, and I can't find any identical models in any catalogues, but the seller of these three pieces of vintage fiberglass kids furniture sourced from a local preschool says they are "surement edité par prisunic."
If that's true, they're probably by either Marc Held or Marc Berthier. If not, then maybe they're Vico Magistretti, or--horreur!--maybe even a knockoff of some kind.
The one thing I'm sure of: it'd be an expensive bear to get this stuff shipped out of France from here. And that's IF you can even pay for it; pas de Paypal, mon ami!