POV: You Can Fill a Swimming Pool With Anything. What Would It Be?
Create a tabletop model swimming pool and fill it with safe materials like water, foam balls, and leaves to compare buoyancy and texture.
About this activity
Create a tabletop model swimming pool and fill it with safe materials like water, foam balls, and leaves to compare buoyancy and texture.
What you need
Step by step
- 1
Step 1
Collect all the Materials Needed and bring them to a flat table.
- 2
Step 2
Put the towel flat on the table.
- 3
Step 3
Place the tub on top of the towel.
- 4
Step 4
Use the measuring cup to pour water into the tub until the water is about 1 inch (2–3 cm) deep.
- 5
Step 5
Arrange the test items in a row on the table so you can reach each one easily.
- 6
Step 6
On your paper write each item's name in a list.
- 7
Step 7
Next to each name write your prediction 'Float' or 'Sink'.
- 8
Step 8
Gently place the first item onto the water surface.
- 9
Step 9
Watch closely to see if that item floats or sinks.
- 10
Step 10
Circle the correct result 'Float' or 'Sink' on your paper for that item.
- 11
Step 11
Use the towel to lift the item out of the water and set it on the paper.
- 12
Step 12
Gently touch the wet item with a fingertip to feel its texture.
- 13
Step 13
Write a short note about how the item feels wet versus dry.
- 14
Step 14
Repeat Steps 8 to 13 for each remaining item.
- 15
Step 15
Share your finished tabletop pool and what you learned about floating and texture on DIY.org.
Fun facts
How do I do the 'POV: You Can Fill a Swimming Pool With Anything' tabletop activity?
To do this tabletop pool activity, set a shallow container as your pool and mark a start water line. Have children predict which objects will float or sink. Add materials one at a time—water, foam balls, leaves, small toys—observe buoyancy and texture. Encourage touching, comparing how items move and feel. Record results with pictures or a simple chart. Finish by drying items and discussing why some things floated while others sank.
What materials do I need to create a safe tabletop pool and test fillings like foam balls and leaves?
Gather a shallow plastic tub or baking pan, water, a measuring cup, towel, and a tray to catch spills. Collect testing items: foam balls, leaves, small plastic toys, pebbles, corks, and sponges. Bring a notebook and pencil for predictions and results, plus a camera or phone to take photos. Optional: magnifying glass, timer, labels, and hand wipes. Choose non-toxic, age-appropriate items and avoid small choking hazards for young children.
What ages is this tabletop pool and buoyancy exploration suitable for?
This activity suits toddlers through school-age kids with adult supervision. Ages 2–3 enjoy sensory play with supervision and very simple materials; ages 4–6 can make predictions, compare textures, and practice pouring; ages 7–10 can design tests, record data, and explore buoyancy principles. Adjust complexity and remove small parts for young children. Always supervise water play, limit depth, and use non-toxic, washable materials to keep the activity safe.
What safety tips and variations can I use for this pool-filling activity?
Keep safety first: use a shallow pool (under 2–3 inches), constant adult supervision, and non-toxic, large materials to prevent choking. Place towels and a non-slip mat to avoid slips, and empty water promptly when finished. For variations, try blindfolded touch tests, temperature comparisons (cold vs. room-temp water), themed pools (ocean or jungle), or a sink/float chart to record results. These tweaks boost observation skills, vocabulary, and critical thinking while keeping play safe and enga
Watch & Learn
Need help?
What can I substitute if I don't have the tub, measuring cup, or towel?
Use a clean mixing bowl or baking pan as the tub, a kitchen cup or jar instead of the measuring cup to pour water to about 1 inch (Step 4), and an old placemat or newspaper in place of the towel (Steps 1–3).
What should I do if items keep sinking or splash when I place them on the water?
If items sink or splash in Step 8, gently lower them onto the water surface instead of dropping, confirm the water depth is about 1 inch (Step 4), and use the towel to dry and lift items as described in Step 11.
How can I adapt the activity for younger or older children?
For preschoolers, pick 3–4 large, safe items and have an adult pour the 1-inch water and record 'Float' or 'Sink' for them (Steps 4–6), while older kids can test more objects, measure mass/volume, and graph results after Step 13.
How can we extend or personalize the tabletop pool experiment?
Make foil boats to test weight limits, compare wet versus dry textures in Step 12 with a magnifying glass, safely color the water with food dye, and photograph your finished pool to share on DIY.org as in the final step.