A ballon is a small rubber bag that you can fill up with air or helium. Balloons stretch, and can get quite big when they are blown up.
Balloons you fill by blowing them up are very common at parties. Helium balloons go up if you let them go, and are fun to play with. Ordinary balloons go down if you let them go, not up.
Bingo is a game for many players, each with a card full of numbers on a grid. The numbers are drawn randomly and players win by matching five numbers in a row either horizontally, vertically or diagonally.
Chess is a game for two people, using a chequered board and pieces of two different colours. There are rules for how far and which way the different chess pieces can move. The object of the game is to capture or check your opponent's king.