These cards are from Uno.
Four
Uno
Unlike the other number cards, there is only one 'zero' card in each colour in an UNO deck, so there are 4 'zero' cards in total.
52 but in UNO cards 104
no. only on number cards
3.5in length, 2.25 width
Uno Attack is a variation on the original Uno game. It has a card launcher (rather than one dealing cards themself) that randomly launches and shoots out cards.
I'm guessing UNO originated from either Italy or Spain. UNO in Italian and Spanish means 'One'. The point of the game is to get rid of as many cards as you can. When you only have one more card you say "UNO". I think that's why they called the game UNO.
you don't have to show your cards when someone else plays the Howler card.
4
No, it is a card game. Uno can either be played with the special trademarked deck of cards, or by using the numbered cards in a standard poker deck and assigning functions (skip, draw 2, etc) to face cards, aces and wild cards.