As part of the Great Lakes Science Center's Spooktacular Science event, patrons will see pumpkins explode and potions mixed. The fun takes place from 10 a.m. to 5 p.m. today and from noon to 5 p.m. tomorrow. Highlights include the icky, stinky Gross Out Science Spectacular, wild potions and brews in the Chemical Concoctions Show, pumpkin explosions outside on the harbor and a Monster Mash Dance Party. The Science Center's "maker space" will transform into a Mad Science Laboratory where guests can come up with their own spooktacular creations and experience "out of this world chemistry" with mystery metals and materials that glow under black light. Activities are all included with general admission, and there's no charge to drop in on the robotics competition. Find a complete schedule and details about ticket prices on the website. (Niesel)