A futuristic model moon base built by members of the Lego Enthusiasts Association of Hawaii will be a new attraction at the University of Hawaii-Manoa Institute for Astronomy's annual open house from 11 a.m. to 4 p.m. April 5.

Children's activities will include a Mars rescue mission game in which they will assemble rescue pods and race them across simulated Martian terrain.

Also featured will be “;Astro-Jeopardy,”; planetarium shows, rocket launching and sundial making.

The event will be at the institute at 2680 Woodlawn Drive.

Dozens of astronomers will be available to answer questions, and some will give short family lectures.

Visitors will be able to look for spots on the sun, see themselves with infrared eyes and learn how to use free software to explore the universe on their own computers.

It will be part of the “;100 Hours of Astronomy Cornerstone Project,”; a worldwide event from April 2 to 5 aimed at having as many people as possible look through a telescope as Galileo did for the first time 400 years ago.

For more information see www.ifa.hawaii.edu/open-house.