LEGO HYDRO DYNAMICS Challenge Kit
Set #45804 · 2017 · 2,052 pieces · Expert build

Set Details
- Set Number
- 45804
- Name
- HYDRO DYNAMICS Challenge Kit
- Theme
- FIRST LEGO League
- Year
- 2017
- Pieces
- 2,052
- Complexity
- Expert
- Build Time
- 8-16 hours
- Ages
- 16+
- Type
- Both play and display
About LEGO HYDRO DYNAMICS Challenge Kit
LEGO HYDRO DYNAMICS Challenge Kit (set #45804) is one of the larger LEGO sets, requiring dedication and space with 2,052 pieces from the FIRST LEGO League theme, released in 2017. The FIRST LEGO League line features robotics competition challenge sets for students. At 2,052 pieces, this is a expert-level build with an estimated build time of 8-16 hours, suitable for ages 16+.
Finding Instructions
With 2,052 pieces, set #45804 comes with a thick instruction booklet — often split into multiple numbered bags and build stages. The official PDF is available free on LEGO.com, or use LegoFinder's AI to find it instantly from a photo.
HYDRO DYNAMICS Challenge Kit FAQ
More FIRST LEGO League Sets
Also Released in 2017
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