I gave the dehydrated child some saltwater to drink
That is going to just make it worse!
I blame it on my autism.
Autistic or not, you should know better than to give them salt water. They need to drink fresh water in order to get hydrated!
I didn't want him to be so happy and I need to put him in his place.
Who cares. if someone is dehydrated you give them water. If you mix your own formulation you can seriously injure them and possible cause seizures.