Okay let me clarify something real quick. You pour the soap in molds. Within the next day saponification has processed and you have soap. You cut the soap and let it dry. Cannot be too hot. If it melts...its not soap. Back to the drawing board.
And if one of the kids tries a taste of the soap at most they will spit it out, or throw up, or tingle tongue. I have yet to see a child take more than an experimental taste of soap.
Spit it back out and not do again usually.
It is the saponification process you must keep out of the hands of little ones.
Melt and Pour is fun. Keep in mind. It is NOT soap. It is glycerin a by product of soap.