@fesshole if you're planning to buy a replacement toy, you can also make use of The Natural Love Company's recycling programme, but in general I'd say dispose of them as small electric appliances.
After ensuring you've cleaned them properly... and removed any removable batteries.

@yschaeff
additional details for the image description:
First photo:

nothing looks out of the ordinary on this banana. Only when you look closer, you see a faint outline of letters.

Second photo:

the banana now clearly shows brown outlines for the engraved letters, spelling "Ananas"

@fesshole