A toddler is intrigued by a toy lego set in a bookstore.
A child is chasing a rabbit in the yard.
The toddler is a child but a child is not necessarily a toddler and this child could be in either a bookstore or in the yard.
Chasing a rabbit is different from being intrigued by a toy lego.
A child can't be intrigued by a lego set in a bookstore and chasing a rabbit in the yard.