Amazon.com: LEGO NINJAGO Journey to The Skull Dungeons 71717 Ninja Playset Building Toy for Kids Featuring Ninja Action Figures (401 Pieces) : Toys & Games
A look through a LEGO catalog from 1998 - YouTube
Near Complete Castle Ninja Subtheme. 12 Sets from 1998/1999. : r/lego
Brock 182 on Twitter: "1998 was such a good year for LEGO https://t.co/FM3cvJbuuh" / Twitter