Bag to Happy Birthday Silk (36 inch x 36 inch) by Mr. Magic - TrickMr. Magic Bag to 'Happy Birthday' Silk is a great finale at kids' birthday party shows. The magician shows 4 different, brightly colored silk hankies (black, white, red, and yellow) to the audience. He takes out a blue bag and places them inside. The bag is held in front of the magician's chest. The magician then gives the bag a shake and, in the blink of an eye, the bag disappears and instantly changes into a large silk scarf foulard with a picture