Materials
 | Two bottles |
| Water |
| Food coluring |
| A tube connecting the bottle |
| A tube sticking out of each bottle |
| A timer to measure how quickly the bottle fills one (1) litre |
| A measuring cup to measure a litre of water |
| A pen to mark the bottle at each litre mark |
| Two scientists (Keshav and Noah) |
| A little brother (Rishi) to help out and share in the fun |
Setup
- Drill two holes in each bottle cap
- Put a straw tube in one of the holes so that we can suck or blow into the bottle.
- Connect the two bottles with another tube using the second hole in each bottle cap.
- Fill one bottle with coloured water.
- Mark a line for each litre of water
