Probably age-appropriate/"balance" and learning how things are. My nephew was into holding two matchbook cars at that age, heck to try and dress/put a jersey on :-) I wouldn't necessarily encourage it all the time. I know it's "easier" to not listen to the fuss but that's what 2 year olds are about, temper tantrums as they figure stuff out and that they can't "do" everything themsevles and that they aren't the ones in charge.