This is a really cute hat that we got for our little 4 year old friend. The lights flash realy bright blue and green, cool for night time, but really bright.  Overall its cute and fun.  Inside the hat are thin covered wires that attach to the lights...in the long run these will probably be pulled out by a 4 year old, but fun in the mean time.  Also, that had is firm, yet can dent if smooshed.