Pressure Cylinders practical-life Insets are blue while frames

Insets are blue while frames are pink

These plastic models include 4 stages in the life cycle of a mosquito: egg

first quarter

One set of small number cards 1 to 9000 contained in a wooden box

diameter 5 cm

Pressure Cylinders practical-life Insets are blue while framesThe Pressure Cylinders provide experiences in pairing and grading degrees of pressure. By pressing the spring loaded plungers, the child senses the difference in resistance. This set comes with a specially designed work tray containing 5 matching pairs of cylinders. Each matching pair has one cylinder with a black plunger, and one with a white plunger. Features Tray dimensions: 23. 5 cm x 10 cm x 2 cm. Cylinder height: 8. 8 cm. Diameter: 3 cm.