Well for the last 30 years (or more?)
Play School has shown kids with Mums and Dads, (or in the old days often just Mums as the dads were at
work when they kids went to the park/zoo/etc) as stay-at-home Dads became more accepted, this was sometimes shown. I don't think 1 gay couple in 30
years is really indoctrinating our kids. Its probably a lot more to do with the idea that any kids who do have gay parents are more readily accepted
by children who have been exposed to this.
Plus its not like the whole show was about gay parents, the show is filmed in a TV set where presenters sing, play with toys, make boxes into cars,
and all the old kids-tv stuff. Theres like a 5minute bit where they look out 'through the windows' and see stuff going on outside.
(For anyone who has seen the show, John is still the best

)