The classic four in a row, here in Hasbro's compact travel edition. Two players each pick a colour, red or yellow, and take turns sliding a disc into the top of the standing grid. Whoever first gets four discs of their colour in a row - horizontally, vertically or diagonally - has won.
The box holds the grid with its side panels, 21 red discs, 21 yellow discs and the rules. The packaging states explicitly that assembling the grid needs an adult's help.
Note that this is the French-language edition, with Puissance 4 as the title on the box. The game itself needs no text - you drop discs and count to four - but the packaging is in French.
The box states age 6+ and 2 players. The format fits in a rucksack or a glovebox, which makes it one of those games you get out while you are waiting somewhere.