Blood splatter, For crime scene investigation and criminal identification based on bloodstains, Bloodstain pattern analysis helps in identification of suspect/victim.
Number, Measurement and Space, module establishes equivalence of sets by a one-to-one exchange of objects. Eg Upsetting equivalance (destroying conservation of numbers) by adding one object to a set, or taking one away, helps introduce vocabulary for comparing quantity
Resonance Wire, Ring Shaped, For demonstrating the vibration knots in determination of different frequencies. Wire ring with 4 mm plug. Diameter: 290 mm