LEGO games are adventure platformer games based on the LEGO brand of block-building toys. They are family-friendly, typically humorous, and quite easy to complete (though some of them are quite grindy).
Most LEGO games are based on various popular franchises like Harry Potter or Star Wars. These games all contain numerous collectible trophies, but are otherwise typically quite easy to complete. However, the requirement to backtrack through the game's levels and complete numerous hub world activities typically makes their platinums reasonably lengthy and grindy (often in the 40-hour range or so).