MESA day held at PLU on Tuesday, March 25, 2014.

And the stressed bridge at the MESA day held at PLU on Tuesday, March 25, 2014.

Setting up a bridge for a stress test at the MESA day held at PLU on Tuesday, March 25, 2014.

Students with bridges line up for the stress test at MESA day held at PLU on Tuesday, March 25, 2014.

Ezequiel Branados, of Keithley Middle School looks at the world through different lenses at MESA day held at PLU on Tuesday, March 25, 2014.

Straw tower building during the MESA day held at PLU on Tuesday, March 25, 2014.

Tre Green, Lenisha Bryant-Hamilton and Amara Gordon react to the slow progress of their car at the MESA day held at PLU on Tuesday, March 25, 2014.

Tre Green, Lenisha Bryant-Hamilton and Amara Gordon react to the slow progress of their car at the MESA day held at PLU on Tuesday, March 25, 2014.

Tre Green, Lenisha Bryant-Hamilton and Amara Gordon a group representing Lincoln HS, watch the slow progress of their car at the MESA day held at PLU on Tuesday, March 25, 2014.

Launching a ball with a robotic arm at the MESA day held at PLU on Tuesday, March 25, 2014.