Keep them until your mother passes I'd say, can chuck them or bury them near her after with any other keepsakes if you're that way inclined.

I get you though, my parents are still middle aged, but I got lots of old crap from my siblings I feel bad chucking away, feels like you're throwing someone's memory away.

Surviving encompasses not being bitten by snakes and spiders, they might not be such a problem in north Europe, but no ones odds of survival improve playing with animals that are often venomous.