[TheBlueMarvel]

^Thanks for that link, it's helpful to know and have handy - that said, it appears that plastic doesn't need to melt to release gases; see the second and third links providing info about VOCs. Additionally, see what Jolliet (second link) says about 'plasticizers' and chemicals being released from plastic toys for up to 15 years after manufacture.

Here's some more info that may help illustrate the concern:

https://www.chemistryviews.org/detai..._Plastic_Toys/

https://news.umich.edu/in-this-seaso...-plastic-toys/

https://molekule.com/blogs/all/what-...childrens-toys

https://www.cdc.gov/nceh/features/leadintoys/index.html

More about VOCs...

https://www.sciencedirect.com/scienc...04389420305859