Birthday Parties at COSI

Have your child's birthday party at COSI! COSI birthdays are a mix of silly science and serious fun!Whether you're examining dinosaur fossils, traveling through space or solving a mystery, COSI birthday parties are perfect for creating an unforgettable day for everyone!


  • COSI general admission for up to 15 children and 15 adults
  • Exclusive use of private party room for two hours, including one hour of guided activities with a COSI team member
  • 10% off in the Science2Go! store for your guests
  • Liquid Nitrogen ice cream made at the party
  • Personalized birthday cake
*All parties must be reserved at least 3 weeks in advance

Make a Party Reservation

Please note that selected COSI program reservations are subject to a nominal processing fee. Proceeds from this fee help to support COSI, a not-for-profit organization. For selected programs, transaction fees may be waived for COSI Members as a benefit of membership.

Ages 3-5

Printable Invitations

Party packages for children ages 3 through 5.

Diggin' Dinos

Examine these fascinating creatures, dig for fossils, and more in this engaging birthday party!

Rainbow Birthday Bash

Bring out the artist in your child! Explore the rainbow and experiment with the science of color using hands-on activities.

Space Explorers

Children who are fascinated with space, stars, astronauts, and rockets will love this interactive birthday party!

Ages 6-11

Printable Invitations

Party packages for children ages 6 through 11.

Astronaut Adventure

Create your own rocket to guide you through a space adventure! Launch rockets, experience the vacuum of outer space, and don't forget the epic landing!

Dinosaur Adventure

Dig into this party to learn how dinosaurs might have lived and died. Hold and examine real dinosaur fossils and become a paleontologist looking for ancient remains.


Grab your magnifying glass and get ready to become a detective! Test your observation skills, gather fingerprints for evidence, and decipher a mystery.