The way I look at it is, s typical toy costs around $30-40. For most toys, it will be used at most 2-3 years before the kid(s) get tired of it. So after a year, it’s either $30-40 in the trash or to goodwill.
Even if the kid or kids parent loses the silver coins, he/she is in no worse shape than gifting a toy that ends up in the dumpster.
Canadian mint actually comes up with some pretty interesting silver coin designs. Granted it costs a lot more than the silver that’s actually in them, but they do different themes.