Kitchen Scientist — Does It Sink or Float?
Child conducts a simple kitchen experiment: testing whether different objects sink or float in water, and optionally what dissolves. The agent guides the parent to observe the child's ability to make predictions, observe carefully, draw conclusions from evidence, and use scientific vocabulary to describe results. Builds the foundations of scientific reasoning through hands-on inquiry.
Opens a guided voice session in TogetherTime.
What you'll need
Fill a large bowl or basin halfway with water. Gather 8-10 small objects with a mix of densities: coin, grape, cork/bottle cap, paper clip, apple, small toy, key, crayon, piece of aluminium foil, small stone. Set them on a towel next to the water. Have paper and pen ready for recording predictions. Towels nearby for splashes.
How it works
- 1~40s
Before ANYTHING goes in the water, we predict! Hold up the first 4 objects one at a time. For each one, ask your child: 'Do you think this will sink to the bottom or float on top? Why do you think that?' you, write down each prediction. The 'why' is the most important part — listen for what reasoning your child uses. Does they talk about weight? Size? What the object is made of? Don't test yet — just predict! Tell me the 4 predictions and the reasons!
Watch for: Child's ability to make predictions about physical outcomes and articulate reasoning behind predictions
- 2~40s
Now the exciting part — testing! Have your child gently place each of the 4 objects into the water, one at a time. After each one, ask: 'Were you right? Did it do what you predicted?' Watch your child's reaction carefully — this is where scientific observation happens. Does they just look at the result, or does they really notice HOW it behaves? Some objects might float at first and then sink, or hover in the middle. you, help your child mark each result next to the prediction. Then hold up the remaining objects and say: 'Now you've seen some results — do you want to change any predictions for these ones?' Tell me the results and reactions!
Watch for: Child's quality of observation during the experiment — watching carefully, noticing details, comparing prediction to result
- 3~45s
Time to test the rest! Let your child predict and test the remaining objects. After all objects have been tested, ask the big conclusion question: 'Look at everything that sank and everything that floated. What do the sinkers have in common? What do the floaters have in common? Can you figure out a RULE for what sinks and what floats?' you, this is where scientific reasoning really shows. Does your child look at the evidence and try to find a pattern, or just shrug? Also ask: 'Were there any that surprised you? Why do you think the surprise ones didn't follow your rule?' Tell me the rule your child comes up with and any surprises!
Watch for: Child's ability to look at experimental results and draw a conclusion or identify a pattern