I prefer just "playful" to "mature but still playful". Something about the straightforwardness of "this is a toy for people of all ages, but it is still a toy" speaks to me.
If these things could be standardized, we would have only one design for every category of item, possibly from different brands.
Since it can't, we have this thing called design and art, which is a good thing :)
I am personally not a fan of the toy-like aesthetic of the colourful switch. But having a choice between both styles is ideal.