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Here is a simple device you can build to remove stud type earrings that have become difficult to remove. I invented this device out of necessity when both my daughters had their ears pierced and a slight infection in the earlobe warranted temporarily removing of the earrings to help cope with the pain. It is simple to make and is most effective. You will need a bolt, a wing nut, and 2 staples or something equivalent to be used as hooks. Note: I used 2 staples as it was readily available and if used with caution, should not pose a risk.
Step 1Build
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Simply drill a small hole at each wing end of the wing nut large enough to accomodate a small hook. I used 2 staples for my hooks.
Slip the hooks in to the wing nut and screw the wing nut into the machine bolt. Make a dent at the end of the bolt in the middle.
I drilled my dent though you tapping a nail into it should work.
With your knack for being clever, you'd be better off to pierce the kids' ears yourself with the proper needles and jewelry. I expect you'd probably come up with something to pop the needle in and guide it. :)
A piercing shop uses a wide bore needle as used in IVs and injections which cuts a C-shape out of the flesh as it passes through and also holds the end of the jewelry so it all goes in at once. It's effective and relatively painless, as opposed to a piercing gun which shoots a blunt stud through the flesh.