The DC always wandered off with random things as toddlers, mostly at our behest as a distraction tool (think "Here is a spoon. Yes, a fabulous spoon. Now go away please and let Mummy do the washing up" sort of thing). However, while DS1 (9yo) has stopped doing it, DS2 (8yo) is terrible for picking up anything that strikes his fancy and wandering off with it. Screwdrivers, tweezers, nails etc - things he knows and has been firmly told not to touch. Today's obsession is one end of an old curtain rail 
Is this a normal thing for a child of this age to be doing? He is under assessment for ASD so I wondered if there might be a link to that, but thought I'd ask about kids in general first. TIA for any help!