Nonogram
Also called Picture Squares, Griddlers, Paint by Numbers, Picross
Shade the cells the numbers ask for to uncover a hidden picture.
Rules
Numbers beside a row (or above a column) are the lengths of its runs of shaded cells, in order, with at least one gap between runs.
✓ 2 then 1 ✗ Wrong order ✗ No gap
Example: Something Sweet
Playing here: Tap a cell to shade it, again for ✕, again to clear. Drag to fill many. Tap a clue number to tick it off.