Building and testing boats is a fun preschool science activity for learning about the properties of materials and the effect of gradient on speed. We split the experiment into two parts. First, we tested different materials to see which worked best as a boat and then raced the boats down different inclines.
This activity is also part of my Playful Science series, so don’t forget to check out the rest!
Which materials make the best boat challenge
Materials
Paper
Optional pirate decorations
Corks
Elastic bands
Skewers
Black cardboard
Wooden lolly sticks
Washing up sponges
Plasticine
Glue
Anything else you want to try
How to make mini pirate boats
Construct small boats using different materials.
We made a lolly stick raft, a simple boat with a washing-up sponge and a paper boat.
The paper boat worked well at first, but as it absorbed the water, it sank.
Our tub boat wasn’t stable enough and fell over. I think we needed a shorter sail.
The raft and washing-up sponge floated well, but both were too big for our half pipes, so we decided smaller washing-up sponge boats would be the best option. These were the perfect size for our pipes.
Another idea is to use corks. We fastened three together with an elastic band and added a sail.
Racing pirate boats
Next, we investigated whether the slope’s incline affected the speed of the boat. We used the sponge boats for this because they were the most stable.
What do you need to keep constant?
Type of boat? Do they weigh the same?
Amount and force of water – is it hard to keep the same?
Variable
Incline
We set up two different inclines with the same length of pipe and released the boats at the same time.
Other Ideas
Use a straw to blow the boats across a calm surface of water. Try blowing gently and then with more force. Then blow close to the boat and then further away.
Another idea is to use the straw to blow waves across the water.
Suitable for Early Learning Goal 16
Exploring and using media and materials
They safely use and explore a variety of materials, tools and techniques, experimenting with colour, design, texture, form and function.
Key Stage 1
Everyday Materials
Uses of Everyday Materials
Working Scientifically
Last Updated on March 16, 2025 by Emma Vanstone
I love your website. Thank you for posting all your ideas. This pirate one looks so fun- it is on the list of things to try this summer!
Hi, great ideas and love the added questions to encourage their inquiry skills. I was wondering what the green stands are that are holding up your 1/2 pipe ramps? Plant cages? Also, did you buy the pipes already cut? If so, where? Thanks 🙂
Love the Pirate Ship made from a cup.
Does the sponge one work? Or does it suck up the water and sink?