What would you say differentiates a child with motor skill issues versus a child who has SPD? With my five year old it's really obvious that it's SPD because the Sensory Modulation symptoms are the most prevalant. My two year old though mostly what we see are delays in her gross motor development and motor planning, clumsiness/falling down easily, low muscle tone, that sort of thing. She sometimes complains about bright lights and does not like slides or little kid rides or things that are difficult for her motor skills but she's doesn't have meltdowns or tantrums really nor does she react strongly to sensory things like touch, smells ect.