There has been similar in my locality. I massively object to it for the following reasons:
Drag queens are associated either with 'adult/late night club entertainment' or charactures in 'pantomimes'. Their humour and dress is frequently bawdy and they naturally are seeking 'attention'. I don't think that it is appropriate to use their desire to entertain/own vanity to impose upon children under the guise of 'educating' them.
Drag queens/like pantomime characters can be scary for young children.
Most of all,above all else, I feel that they damage rather than educate children by presenting a highly distorted and ridiculous representation of what it might be to be gay or transexual.
They monopolized our local library in Bristol for baby/toddler reading sessions. Of course, the trendy mums jumped upon the band wagon and dragged their kids along trying to demonstrate how flipping liberal they were, whilst, in my view actually damaging the image of homosexuality and transgender. In my experience most homosexuals and trans wish to appear normal and fly under the radar. They want to be seen as themselves and as credible people. I would have no objection to a gay man/woman or a trans reading a normal children's story to kids in the library. This, in my view, would-be a far better way at integrating them into society. They should be simply accepted as normal individuals and not presented as charactures satisfying their own attention seeking behaviour. I mean, really, what do they actually expect children to get out of it?!!