If you have a little girl, or know a little girl, you have to take her to see A Midsummer Night’s Dream at Pacific Northwest Ballet, where girlish fantasy is fulfilled onstage. Fairies in flower petal skirts, iridescent insect servants, a queen in a snail shell boudoir – all framed by sumptuous cabbage roses and morning glories on a scale to make the dancers seem Tinkerbell-sized.