$25.00 incl GST & delivery
A latex glove, dry sand and reduced air deliver this amazing and thought-provoking demonstration. Insert the vacuum valve in the glove, fill with one cup of sand or seeds, tie it up and suck air from it with the pump. Now pull and stretch the fingers and amazingly they get locked into position . . . Re-do it with coarser fillers such as lentils, mustard seeds, etc. to see grizzly textured skin effects on the glove. Be warned! As the air seeps back, the hand generates peculiar, life-like sounds and movements.
Why does this happen? What does it teach about atmospheric pressure?
This kit is a great teaching aid but also a great conversation starter about our atmosphere and its invisible fast-moving gas particles. Have fun!
What is in the kit?
Supplies so you can prepare 10 hands, 2 at a time
2 Vacuum valves
1 Vacuum pump
10 Latex gloves
1 Instruction sheet
1 cup of polenta, raw sugar or sand per hand
Selecting a filler medium:
The following two products,
Polenta (coarse) and
perform very well in this demonstration. Do not mix them, use each on its own. They have the right consistency and particle size distribution that enhance the feel. Try to locate them and use them instead of sand. You’ll need at least 1 cup.
Create a weird skin effect
Fill the gloves with any of these fillers to create a peculiar skin effect. We have used the following coarse fillers with great success. What have you got in the pantry? Tip: Do not use fine products where small particles can sneak through the fabric and block the valve. Cornflour and castor sugar is definitely out.
All material Copyright, 2019 EduScience Pty Ltd
Pack of 24 boxes, Pack of 12 boxes