I've often wished we had a big LEGO® vacuum cleaner that sucked up and sorted LEGO®. Our collection is mixed up in a large box under my 7 year old bed. So today, we set about making a LEGO® filter. This is our first attempt and needs a little refining.
First, we looked around the house to see if we already had anything that would work as a filter. All our colanders and sieves were too small, so we used a cardboard box to make our own. One side is for the small square brick with four nobbles, and the other is for the rectangle brick with eight nobbles.
What do you think?
Next Steps
We decided we needed sharper scissors or a craft knife to make the holes neater and more of them.
A second filter layer with smaller holes would filter out smaller bricks again, hopefully leaving behind mostly the size we wanted.
Can you think of anything else we could do to improve our filter?
MORE LEGO® Science Ideas
Try one of these 10 fun things to do with DUPLO®.
Design and build a LEGO® catapult.
Learn about gravity and air resistance with a LEGO® Parachute.
Create a LEGO® Maze.
Last Updated on February 25, 2025 by Emma Vanstone
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