Pick the ONE thing you want to improve, and focus on that ONE skill.
What I mean, is if you want to focus on fine motor skills, stay focused on task at hand.
Here, it is to strengthen the little muscles so that down the line your child can correctly cut and hold a pencil.
You want to stay focused with your goal.
If the goal is fine motor grip, try not to also throw in letter recognition and sequencing. You can keep the brain power to a minimum so that your reluctant toddler or preschooler can really zone in on what they need to work on.