This is no plaything for family entertainment, no Max Ernst for cosy winter evenings - but an ironic commentary, the family as a 'mobile' that has to fixedly install its movements. It is put in motion, but all movements only run forwards and backwards. It is no perpetuum mobile, it rather comments the impossibility of movement without an external supply of energy, that could perpetually work at some task. Families would not recognise themselves in this object, but it ironically alludes to this educational institution without harming it. It would only be more transparent, less ideal, imperfect - and thus more realistically portrayed.