Visit Us


The Long Island Explorium is housed in the beautiful historic Chandlery Building in Port Jefferson village.  The building was built in the 1890’s and served as the chandlery, a store that sold nautical gear, candles, rope, sail repair kits and all of the other equipment a ship would need for a long voyage.

Visitors to the Explorium will enjoy fun and interactive hands-on exhibits all aimed at fostering the understanding and love of STEM.


Summer Hours (up to Sept 2nd)

Wed - Sunday 1-5 pm


Fall/Winter/ Spring

Saturday and Sunday

1:00pm - 5:00pm

(Other times by reservation)


$5 per person

Members and children under 1 are free
Port Jefferson Library card holders - $1 off each admission ticket

Field Trips

Hands-on Workshops for Young Scientists, Grades Pre-K to 6TH!


Long Island Explorium has an abundance of maritime experiences for little explorers


Long Island Explorium has a variety of programs for families, students, educators, and other explorers


Sept 8-9

What kind of house would a robot like to live in?

Come build a "house" for Vernie, our Lego robot to live and have fun in at the Explorium! I bet he would love a "rollercoaster" in his bedroom!

Sept 15-16

Sad summer is over?

Well, not at the Explorium! Come join us as we explore our beautiful Port Jefferson Harbor front and do some late summer gardening. Special exploration program on Sept 16th at 1:30pm and 3 pm. First come, first serve.

Sept 22-23 

NO more straws!

Let's keep straws out of our landfill. We're going to "Recycle, Reuse, Repurpose" straws into creative inventions.

Sept 29-30 Gone Fishing!

Come have fun with Little Bits!

Build a "Bubble Bot". Build your own bubble blowing contraptions while learning about circuits and invention! Let your imagination guide your next invention!

Book a Birthday Party

Children will enjoy 90 minutes of exciting, interactive activities.


  • Two teachers to facilitate activities
  • Activity materials
  • Invitations
  • Paper goods
  • Pizza and drink
  • Music
  • Guest pass for a future visit for every child

Dates and times by reservation
Call: 631-331-3277
Email: carole@LongIslandExplorium.Org

Price $250
Up to 10 children included in the price, each additional child is $15
Parents supply any additional food, cake or cupcakes, drinks and snacks