Compulsion toward even numbers, OCD or maybe nothing?

One of our children has always had a tendancy to get fixated - at 2 and 3 she would stay up for hours folding and refolding blankets, for example. As we have addressed some of her anxiety and given her more coping skills, that faded. But now at age 7 i am noticing some behaviors that I associate with OCD coming up - when we are getting on the bus or subway for example, she feels she must touch the strips in the doorway with both feet to make it even. Or when she turns the tv volume up it must be even. Or when we feed the reptile crickets it must be an even number.Maybe its just a quirk? Since its small things she mainly can do things the way she needs and it doesnt seem to be causing her distress. But have you had any of this with your kids? Did it go away, stay the same or get more serious? via /r/Parenting http://ift.tt/2yEkJnl