To begin D & T week, we explored a variety of objects in groups including balloons, a balloon pump and whistles in order to sort them into those that are pneumatic and those that aren’t.
We had to consider:
- Any similarities between the objects
- Any differences
- What they do
- How they do it
We recorded our initial observations on post-it notes and then shared our ideas as a class.
We then constructed a simple pneumatic system using a washing up bottle, a piece of tube and a syringe.
We had a few problems:
- we weren’t quick enough
- we ran out of air
- air was escaping
To prevent this we:
- worked in partners
- added another tube to let air in
- used blue tac as a ‘shield’
- used a paperclip/band to secure the balloon