• Seriously Cool
  • Wildest Weather
  • Tiny Giant
  • Summer Skies

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For less than $10 a month for a basic membership, COSI Members enjoy exclusive discounts, free year-long admission to COSI, and free admission to 350+ science centers worldwide! Join today, and you’ll support COSI’s mission to inspire the scientists, dreamers, and innovators of tomorrow.

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Annual Free Teacher Resource Fair

Tuesday, August 11, 2015, 10am to 2pm

COSI Loves Teachers! Educators will receive free admission to a special resource area, admission to COSI’s classic exhibitions, a chance to see a giant screen film and planetarium show for free, plus fun freebies, door prizes and lots more! Reservations are required. Learn more

From the Calendar

Family Friday Night
31 Jul 2015 5:00PM - 9:00PM
COSI offers extended hours and price reduced admission to families so you can visit, learn, and play late! General admissio...
COSI After Dark - a 21+ Event - Brewing and Distilling
06 Aug 2015 5:30PM - 10:00PM
It's COSI without kids! Join us to learn how your favorite beverages are made. Sample some of the best local beer and spirits...
Farm Days: Little Seeds, Big Tractors
12 Aug 2015
COSI brings the farm to the city with Farm Days. See more than 20 pieces of farming equipment, climb into tractors, a combine...