Griff Jones stretching silly putty while someone measures using a ruler.

Stressing Silly Putty

about 100 minutes
Conduct stretch-tests on homemade silly putty to explore how engineers design more realistic crash test dummies.

A pencil pointing into a finger.

Stressing Over Pencil Pressure

about 40 minutes
Use pencil push-tests to learn the difference between force and pressure and explore how safety features protect human bodies in a crash.