I laughed too. It would have been a very different story if he'd been bitten, but no harm done.
I'm not sure it's clear from the article that the mother knew what the takeaway container was for until she found the eggshells and the snakes in it. The child might have asked her for a container without mentioning the eggs. If she did, yes, bad idea, but I suspect she will be much more careful in future.
What kind of parent gives a 3 y.o. child a container to STORE UNKNOWN ANIMAL EGGS IN, in the first place?
I'm not sure it's clear from the article that the mother knew what the takeaway container was for until she found the eggshells and the snakes in it. The child might have asked her for a container without mentioning the eggs. If she did, yes, bad idea, but I suspect she will be much more careful in future.