You should listen when your gut instinct says 'don't let her play with the glitter. it will only end in tears (and a huge mess)'
It doesn't do your credibility as an authority figure any good when you laugh at your child's insolence. Eg 'I'd like you to go straight to sleep please' - response 'Certainly your majesty'
My daughter thinks that she can't watch Law and Order because its about dinosaurs fighting. What is with the dinosaurs lately?