There are truly gender neutral toys - plain wooden blocks, empty yogurt pots, musical instruments, paint, paper, crayons etc, sand and water tables, plain tennis balls, stones, sticks...
There are truly gender neutral clothes - plain jeans, red/White/black tshirts. Oatmeal/natural coloured things. Even bright yellow.
Those are actually gender neutral. What we see here in the article isn't gender neutral. Having the choice of a fairy dress/flowery top ISN'T gender neutral. Fairy dresses, dolls, trains, 'boys clothes' shouldn't even be in the picture as they aren't neutral.
If they are trying to genuinely do some sort of social experiment or whatever they should at least do it right..!!