There are multiple factors that impact bone health, including birth weight, nutrition, medications for seizures and/or reflux, genetics, and physical activity. Targeted exercise to improve bone health in childhood can be sustained into adulthood, and childhood is the best time to promote bone health.
I have cerebral palsy spastic diplegia. So it affects my legs and sometimes my fine motor skills. I walk with two canes. I do things a little slower, but I get things done.
One thing that parents can say to start a conversation with their kids is, "Let's talk".