As a parent, I think every parent wants the best for their child and hopes that their children will discover their passions, because these interests are what make our kids unique individuals. Personally, I'm more of the mentality that my kids are little individuals with their own likes and dislikes - some may resonate with mine, but many will not. I try to expose them to a variety of experiences, like bringing them to zoo trips or library sessions, as you've mentioned.
With two energetic kiddos in primary school, I just let them take the lead sometimes; it's fascinating to see what captures their attention! And when they get hooked on something, I do my best to facilitate their newfound interests however I can because childhood passions, no matter how fleeting or lasting, are so precious and deserve encouragement.