You can purchase topical magnesium products.
Kirkman magnesium cream was designed for autistic children and has
a measuring device 100mg/gram
You can find it by Googling.
Sublingual is not likely to work, because of the limited absorption area and magnesium and calcium are high dose minerals.
I am not aware of a calcium lotion however.
There are many calcium liquids for children. May be added to foods if necessary. Lactaid makes a calcium enhanced milk, and many orange juices have calcium added now.
There are even calcium gummies now: example
http://www.amazon.com/Citracal-BAYER.../dp/B004L4ANAS
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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