Scuba Diver 1

Scuba Diver

Scuba Diver

Scuba Diver is a fun science experiment for kids to do at home which shows how density plays an important role in sinking and floating of objects. Kids can learn while they can enjoy playing with their handmade toy, the Scuba Diver.
Kids can watch their scuba diver go up and down and learn the scientific principle behind the working of actual scuba divers!

Safety First! Adult Supervision Required. Don’t Eat/Drink your Experiments, Wear safety goggles where ever required

Materials and tools required.

scuba diver-Experiment_Step 0

In the box

  • Rubber Bands
  • Pipette
  • Paper clips
  • Googly Eyes
  • Scissors
  • Marker
  • Fevi-kwik
  • Water
  • 500 ml plastic bottle

 Youtube for the Experiment


What to Do!

  1. Mark 1 and 2 on two pipettes.
  2. Cut the latter half of both the pipettes.
  3. Using fevi-kwik, stick the googly eyes on both the pipettes.
  4. Tie a rubber band on the neck of each pipette.
  5. Make a chain by joining three paper clips together. Make 7 such chains.
  6. Hook the chains into the rubber band
  7. Put 4 paper clips into one scuba diver and 3 into the second one.
  8. Fill the Plastic Bottle with water up to brim.
  9. Put both the scuba divers into the bottle and put the cap on the bottle.
  10. Squeeze the bottle at its centre and both the scuba divers will move up and down.

Images for Instructions

Working Principle of Scuba Diver :

In this experiment, children learn the importance of density in floating and sinking. Kids will also understand Archimedes’s principle. The diver floats initially in the bottle of water because its density is less than water. As it is floating, there is a buoyant force which acts as the weight of water displaced by the diver is equal to its own weight. This is called the ‘Archimedes’s principle’. When one squeezes the bottle, water rushes inside the diver making it denser as there is more water and less air inside the diver now. As a result, the diver has displaced more water than its own weight and starts sinking.

This is exactly how a real scuba diver floats and sinks in the deep seas. They adjust the level of water in their apparatus to change the density and sink and float accordingly.

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