Dec 28, 2012 1 min read

Carnegie Science Center in Pittsburgh will break out its messiest, sloppiest, grossest activities for a one-of-a-kind celebration set for 10 a.m. to 5 p.m. Tuesday.

MessFest will feature a variety of hands-on activities.

Visitors to the program will have the chance to get slimy with oobleck, a gooey substance that feels solid when picked up, but then slips through the fingers like a liquid.

The Egg Drop activity invites visitors to encase a raw egg in various packing materials, then to drop it over the outdoor railing to see whether it breaks. Children can become messy artists with finger painting, create their own “Mars” soil as they explore the characteristics of the Red Planet’s “dirt,” make sidewalk chalk out of plaster of Paris and tempera paint, and compete in a pie-eating contest.

Visitors can also experience the Science Center’s high-energy theater programs: “Plant Pop Extreme” in the Kitchen Theater and the “MessFest Challenge” in the Works Theater.

MessFest activities are included with general admission to the Science Center. Details: CarnegieScienceCenter.org or 412-237-3400.