Is There a Lego Boat That Floats?

Are you a Lego enthusiast and wondering if there’s a Lego boat that can actually float? You’re not alone!

Many Lego fans have searched for the answer to this question. In this article, we’ll explore the world of Lego boats and find out if they can stay afloat.

Can Lego boats float?

The simple answer is yes, but it depends on how you build them. There are various ways to build a Lego boat, but not all designs will keep the boat floating. The key is to make sure the boat is watertight and has enough buoyancy to stay afloat.

How to build a floating Lego boat

To build a floating Lego boat, you need to follow specific steps:

Step 1: Choose the right pieces – Although it may be tempting to use any available pieces, some work better than others. Use smooth tiles for the base of your boat as they create an excellent seal against water.

Step 2: Design your hull – The hull of your boat must be watertight. It’s essential that you fill any gaps in your design that could let water in. Try building up layers of bricks around the edges of your baseplate, which will help keep water out.

Step 3: Add buoyancy – Your boat needs enough buoyancy to keep it afloat. To add buoyancy, use pieces such as inverted slopes or even foam blocks cut into shape and placed inside your hull.

Step 4: Test your design – Once you’ve built your boat, test it in shallow water such as a bathtub or sink before using it in deeper waters.

  • If your boat sinks:
    • Add more buoyancy by adding more foam blocks or redesigning the hull.
    • Ensure there are no gaps in the design where water can enter.
  • If your boat floats:
    • Have fun and enjoy your Lego boat on deeper waters, such as a pool or pond!

Types of Lego boats

There are different types of Lego boats you can build, and each requires different building techniques to stay afloat. Some of the common types include:

Sailboats: These boats feature a mast and sails, which make them more challenging to build. The sails add weight to the top of the boat, so it’s essential to ensure there is enough buoyancy at the bottom.

Tugboats: Tugboats have a flat-bottomed hull that makes them stable in water. With their high sides, they have a large surface area that makes them easier to build watertight.

Catamarans: Catamarans have two hulls and are more stable than other Lego boats. They’re easier to build watertight than sailboats because they don’t have any sails.


In conclusion, it’s possible to build a Lego boat that floats! The key is to follow specific steps such as creating a watertight hull and adding enough buoyancy.

Remember also to test your design in shallow waters before using it on deeper waters. With these tips in mind, you’re ready to set sail with your very own floating Lego boat.

Photo of author

Daniel Bennet