The jumping puzzle should be climbing up a giant spiral Christmas tree, having to jump around the edge of it; running on the cords for the lights and then having to run towards the center to maneuver through the inner branches.
Some ornaments could be “enchanted” and would dance around and you would have to jump on them to get through certain sections. At the top would be a platform with a glowing star and a chest. Something like that.
Also, bring back the snowball fight from GW1. So much fun.