The Legacy Challenge hasn’t really changed much. You are welcome to make a vampire founder/heirs. Just bear in mind that since they are immortal you will need to figure out what to do with the older generations as the challenge progresses. Toddlers haven’t really changed anything in this challenge aside from adding an additional life stage to play.
As far as the Wonder Child is concerned toddlers added a bunch of new points and bonuses to earn so make sure you read over the rules carefully! You will NOT be able to use vampires in this challenge as that will eliminate the “time crunch” aspect of it.
The Random Trait Generator has been updated to include the new vampire aspirations (though if you decide you don’t want a vampire in your family or you don’t own the pack, you can simply re-roll). Toddlers also have their own Trait Generator for you to use as you need it!
As always, let us know if you have any questions!