7 PIECE ACRYLIC PRISM SET IN WOODEN BOX watches Children (and adults alike) can

Children (and adults alike) can learn about air compression and dynamic energy

Output Voltage: 3

Available in 3 different capacities

The Roman Onager catapult is a version of a Mangonel which uses a sling bucket to launch

7 PIECE ACRYLIC PRISM SET IN WOODEN BOX watches Children (and adults alike) canKit contains seven acrylic prisms measuring 13mm thick (approx.) Shapes include a rectangle, a semicircle, three triangles, and double convex and double concave prisms. Prisms are polished. Acrylic material is less vulnerable than glass. This is a great set for classrooms and for home schooling learning about the properties of light.