The COSI building is temporarily closed.
Learn More

Science boxes with five days’ worth of themed STEM activities and science experiments for kids delivered right to your front door!

COSI Connects Kits - Science boxes with five days’ worth of themed STEM activities and science experiments for kids delivered right to your front door!

Can I add an additional person or childcare worker on my membership?

Yes, up to two (2) Add-on Guests may be purchased and added to any membership. The Add-on Guest is unnamed, so Add-on Guests are not members but receive free admission when visiting with a named member (adult or child) whose membership features this option. An Add-on Guest can be a different person each visit, adult or a child.
One (1) Add-on Guest is included with a Premium Family Membership and two (2) Add-on Guests are included with a Ultimate Family Membership.


E-Mail Membership Team

CALL: 614.228.2674
Mon-Sat, 9am - 4pm EST

Member eNews Signup

Signup and receive membership information, upcoming events, new offers just for COSI Members, and more.


COSI Membership