obstacles- depending on water restrictions and if playing outside, fill some water bomb balloons with water to hang down. Place down a tarp and add a sprinkler and some bubble or washing detergent to crawl through- ensure solutions are safe for chn.
Spider-Mans web at superhero party. The simplest activities are the best with kids! Make a spider web out of painter's tape, let them throw scrunched up newspaper ball to see if they can get them to stick.