Children at FIRST LEGO League tournament

FIRST® LEGO® League UK and Ireland

Design solutions for real world problems and build a mission-solving robot made of LEGO®!



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How to register

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FIRST® LEGO® League Challenge 2017: HYDRO DYNAMICS

On your mark, get set, flow!

Drink in the 2017 HYDRO DYNAMICSSM season and learn all about water – how we find, transport, use, or dispose of it. In the 2017 FIRST®LEGO® League Challenge, students age 9 to 16 from 80 countries will make a splash with HYDRO DYNAMICSSM. What might become possible when we understand what happens to our water?

FIRST® LEGO® League schedule for 2017-18

1 June 2017 Registration opens
30 August 2017 Global challenge release
Early September 2017 Challenge Sets ship (conditional on registration fee payment)
October 2017 Team registration closes
November 2017 - January 2018 Tournament season

24 February 2018

UK and Ireland Final, University of West of England (UWE) Exhibition and Conference Centre, Bristol.
April - June 2018 World Festival in USA, Open International in Estonia, Open Invitational, Central European in Hungary

Core Values

The FIRST®LEGO® League Core Values should guide everything your team does. It is very important you understand them and ensure that you can demonstrate to the judges that your team embodies these Core Values.


Learn about FIRST® LEGO® League's Core Values



This year’s project is explained in the Challenge Guide. Download the Challenge Guide now!

For quick reference the shorter Challenge Document is useful. Download the Challenge Document now!

UPDATESFIRST release updates during the season to clarify points that are not clear in the Challenge Guide. Download the latest updates now!

NEW for 2017-18 – The Project Rubric has changed a bit. Download the new Project Rubric now!

Watch the new Hydro Dynamics Project Video to help you understand what to do.


Robot Game

Build your Hydro Dynamics mission models. Download the Build Instructions now!

Image of Zip logo   Hydro Dynamics Build Instructions  

Set up your playing field (mission mat). Download the Field Set Up Guide now!

Read and understand the robot mission rules and scoring instructions found in the Challenge Guide. Download the Challenge Guide now!

UPDATES. During the season FIRST clarify some of the mission rules. Download the latest Challenge Updates now!

Watch the new Hydro Dynamics Robot Game Video to help you understand what to do.


Mission video for Spectators

Use this video to help your spectators to understand what the robot has to do for each mission and how many points will be scored.


Download the LEGO® MINDSTORMS® Education EV3 software for free at



As a coach you may find these two documents useful.

Download the Coaches’ Handbook 2017-18 now!

Check out the Participation Rules!

Visit the FIRST® LEGO® League website

Don’t miss the new FIRST® LEGO® League webinars which train team coaches how to use the LEGO® Mindstorms robot kit. Delivered by LEGO® Education certified instructor John Pinkney and Colin Talbot from Raising Robots these webinars show how to get the most out of your robot building kit. 


Teams meet three panels of judges on the tournament day. They present their project and answer questions about it; are interviewed about how they implemented the FIRST® LEGO® League Core Values; and discuss the design of their robot.

Download the mark schemes [PDF: 0.64MB] which are used by these judges to ensure that your team know what they'll be scored on.