Marko Marojevic, left, 6, and Lika Tajsic, center, 7, both of Indian Head Park prepare to launch their vinegar and baking soda rocket during a family science night. | Rob Hart~Sun-Times Media

Lilly Hahn, 14, of Willow Springs and Jack Sheehan, 14, of Indian Head Park demonstrate how pressure holds a card on a cup full of water during a family science night at Pleasantdale Elementary School. | Rob Hart~Sun-Times Media

Luca Casciani, 5, of Burr Ridge plays in foam made from an exothermic reaction during a family science night at Pleasantdale Elementary School. | Rob Hart~Sun-Times Media

Lika Tajsic, 7, of Indian Head Park watches his vinegar and baking soda rocket launch. | Rob Hart~Sun-Times Media

Karina Bruzas, 8, of Burr Ridge launches her baloon rocket during a family science night. | Rob Hart~Sun-Times Media

Ida Castro, 7, of Burr Ridge catches a bubble in her hands with gloves that will keep the bubble from bursting. | Rob Hart~Sun-Times Media