How Long Does LEGO® HYDRO DYNAMICS Challenge Kit (45804) Take to Build?

A typical builder finishes LEGO® HYDRO DYNAMICS Challenge Kit (set 45804, 2,052 pieces) in about 5 hours 30 minutes. Taking it slowly runs closer to 7 hours 30 minutes; building at a fast pace, about 4 hours 5 minutes.

PieceTick estimates build time from piece count, part complexity, the set’s age rating, your experience level, and how you sort pieces. Adjust those on this page for an estimate matched to how you build.