I wonder if it takes the boys longer? I have 3 girls, the youngest is a little over one, and she still does it, but my other girls are not vacuums anymore really not interested in putting every imaginable object, twig, etc into their mouthes, they are 3 and 13.
But! My boy is almost 2 1/2 and he still thinks if it will fit in his mouth, it must be edible
