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The more you play the more like Albert you will become! WARNING: DON’T GET ADDICTED OR YOU WILL LOSE SLEEP! This easy to learn math card game is fun and challenging. Beginning with the number ‘1’ as the first answer, you’ll be using addition, subtraction, multiplication, or division to combine the randomly displayed four cards into the next number in the sequence, so using the operations, the only answer for the next player is "2”. Sometimes you’ll fl y through the sequence with ease. Other times you’ll literally sit and stew over the cards hoping to expose a combination that produces the needed number. We love this game! It encourages creative and critical thinking. Example: If the four cards are 1-2-3-4, then you could say, "2-1=1, 3-1=2 ( or 4-2=2, or 4+1=5-3=2, etc.), 2+1=3, 4x1=4, these are easy so far...But, how do you make 17? 4+1=5x3=15 +2=17, or, any other combination you come up with while using each card no more than once. We allow a few minutes in our school day to play this game, however, we ALWAYS go over the time limit. Great for solitaire or multi play. Albert’s Insomnia includes 48 cards and complete instructions. Ages 8 and up.