In celebration of both spooky season and National Chemistry Week, kids of all ages don their mad scientist lab coats for Creepy Chemistry Weekend at ECHO Leahy Center for Lake Champlain. There’s something weird and wonderful for everyone, from fluorescent foods with the University of Vermont chemistry department to slimy crafts such as paper making. In between all the spine-chilling science activities, kids in costume can enter a contest to win tickets to ECHO’s 3D movie theater; getups related to science, nature or Champ the Lake Monster garner extra points.

Price: Regular admission, $14.50-18; free for members and kids 2 and under.