There is much to be done so let's unite with all our kids and say to them. Children are proudly claiming to be "green" as a sign that they will not waste our natural resources.
self esteem
Have You Seen Green Kids?
What Toys Are Safe For Kids
As far as what's being done to prevent this from happening again, I'm sure quality assurance in the toy factories in China are being heavily scrutinized. But if you really want to play it safe, knowing something is produced right here in any country.

Eat, drink and be miserable: the true cost of our addiction to shopping
While our green consumption may make us feel good, like we've done our little penance, the consumer culture is at the root of our climate and energy crises. This Guardian writer predicts that it will take governmental rationing, in the style of a war effort, to motivate the kinds of behavioral changes that are needed. She hopes for "... a low-consumption economy oriented towards facilitating the real sources of human fulfilment. Most of us dimly recognise that huge lifestyle changes are necessary, but we're waiting for someone else to initiate the process."