Someone tried to make something similar but with GPS, cellular tracking and such. They never quite got it working and here you have a highly technical item but maybe, just maybe a smart watch and you hiring app developers would be best. It won't be cheap and frankly you need to do better than just a press this button.
Teach the child to alert the teacher or nurse. One of the downsides of this product is that it won't work when the battery is dead.
I have a client who's looking to do a research project with kids that have food allergies. They want a standalone wearable which the child can push/touch every time they feel anxious about their allergy during the day.
We can write an app for them, but I'm having trouble identifying a suitable standalone programmable wearable for this study. Any advice or suggestions would be greatly appreciated!