My (no resoundingly ex) friend said that this exhibition was designed to help children understand if they were 'queer'.
Queer doesn't just mean gay these days.
Groups like Gendered Intelligence say they're about breaking down stereotypes but really they're about promoting queer theory.
Queer theory is based on post modernism which teaches that there's no such thing as objective reality. Our reality is based on our perception and our subjective decisions to categorise stuff. So a table, a cat - or even a woman - are concepts that we apply to the world but which aren't fixed to external reality.
From this comes queer theory, that is concerned with gender and sees even biological sex as simply a concept applied to people, something we can change simply by perceiving it differently.
Queer theory is also concerned with breaking down social norms. It divides sex and sexuality into "normative" and "deviant". (Normative being seen as bad, deviant being seen as liberating, broadly).
Homosexuality is "deviant" according to queer theory and therefore a good thing as It's breaking with social norms. But, also, kink and extreme sexual practices that break with convention are considered "deviant" (and therefore a good thing) and therefore "queer". This, and people supposedly changing their gender means a bunch of people we would see as straight are now calling themselves queer.
Some queer theorists also teach that what's wrong with rape, incest and even paedophilia is not so much the act, but society's reaction to it - the social stigma. There are some pretty strong connections between paedophile and queer theory - postmodernism started with Foucault, and he argued for the age of consent to be removed completely. There's a good video on this on YouTube with Derrick Jensen. I'll link after breakfast if no one else gets there first.
How popular is queer theory? Very. It's taught in all our universities. Women's studies has been largely replaced with gender studies and gender studies includes queer theory.
Most young people who are into queer theory won't be aware of the links to paedophilia - but when you read the texts of queer theory they undeniably exist.
And it makes logical sense - if you want to break down all social norms and all kinds of "deviancy" are to be encouraged then that's going to include breaking down social norms that are there for a very good reason.
Disclaimer I'm just learning about queer theory myself. Will post links later but check out Selina Todd's talk at WPUK (transcript on their website, video on YouTube) which touches on this.