Using the Stretchy Hair Branch doll is easy. Just grab his hair and stretch it as far as you can. You'll see the glitter move around in the goo - filled hair. When you're done stretching, the hair will return to its original style. Here are some tips: Don't pull the hair too hard or it might tear. After playing, keep the doll in a clean and dry place to avoid the goo getting dirty. If the hair gets a bit messy, you can gently reshape it by hand. Have fun collecting all the stretchy - haired Trolls dolls!