When looking at development, keep in mind that milestones should be considered a guideline. Just as some toddlers are ready to speak earlier than others, fine motor skills vary from child to child. Plus, readiness to develop fine motor skills depends on a child's interests. A child who loves books may excel at reading at a young age, but may struggle to work fasteners on clothing. Developmental milestones are considered to be a general guide to help us monitor a child's growth and maturity.