I mean, there's 'movement' involved! And really, who has the time to let their toddlers have some pure, unadulterated, non-skilling fun? Uhh, definitely not.me, anyway. It's never really made sense to me why toddler sims can't gain any skills from splashing around in the kiddie pools.
I no longer own every pack, but there shouldn't be any issues with the newer ones unless they specifically edit the kiddie pools in some way. Notice : Just tested in-game following the 4/28 patch, and everything still seems to be in working order.