This was our first sink or float experiment and it felt like the most obvious thing to test craft materials!
This idea came to me one day and it took literally five minutes to prepare. Actually I think it took me longer to write the chart than to do the rest of it!
I collected a range of craft materials to test:
- Pipe cleaner
- Rainbow pompom
- Sparkly pompom
- Craft stick
- Wooden bead
- Plastic beads
- Googly eye
- Plastic jewel
- Pouch cap
F was very interested in this activity and we both tried to predict the outcome of placing each craft material into the water.
There were several surprises: The wooden bead floated, but the plastic beads sank. The rainbow pompom floated, then became waterlogged and sank – but the sparkly one had some sort of foam centre, and only floated. The sponge kept us guessing for a while because it floated, then sank, then floated again!
After making these observations, F really impressed me by noting that the large googly eye only floated, and suggesting we should try different sizes. They floated too but I liked how he was thinking.