Comes in bits and pieces, put together forms a whole. It's athletics for the mind, the more you think the more you find. Sometimes it can be a grind, but then, that is the goal.
Answer: Puzzle.
This riddle appears in the following downloadable PDF files:
Can you solve one of the most famous logic puzzle ever?
Memory Matching game for kids, adults and seniors.
Connect the matching tiles and pop them all.