How Long Does LEGO® Bricks, Half Bricks, Two Trolleys (520-17) Take to Build?

A typical builder finishes LEGO® Bricks, Half Bricks, Two Trolleys (set 520-17, 21 pieces) in about 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.