Cosmic Cards is an astronomy themed card game designed to engage primary school aged children (ages: 5-11) with astronomy. The game consists of 5 decks with each deck of cards following one particular theme (e.g. the solar system) and containing between 20 and 25 cards (depending on the theme). The image below shows an example card, with the front on the left and back on the right. In this case the back of the card shows a finding chart for the particular object.
The main game is played as follows. All the cards are dealt as equally as possible to the players and the players hold their cards in a face up stack so that they can see their first card only and the other players cannot see their card. The starting player - normally the player to the left of the dealer - chooses one attribute - for example mass. Everyone then reads out the value of that attribute on their first card and whoever has the highest or best value wins all the first cards, collects them and places them at the bottom of their stack.
Whoever won the cards then chooses any attribute to read from their next card, and again whoever has the best value of this attribute on their top card wins the cards and has the next turn. This continues for as many turns as necessary, and players drop out of the game as they run out of cards. Whoever eventually manages to collect all the cards wins the game.
In some cases it is possible to have a tie for best value of an attribute. If this happens, all players place their top card in the middle of the table and the turn remains with same the player who chose that attribute. The next player who wins cards also collects the pile of cards from the middle of the table.