The POOF-Slinky 06400 Slinky Science Space Theater Light-Up Planetarium is a fun tool to introduce your child to the wonders of the night sky and the visible parts of our immense universe. The Space Theater Light-Up Planetarium activity set includes a projector base that houses your light source and electric circuitry (requires (2) “C” batteries not included). The Star Dome is held in place with an adapter ring and has hundreds of small holes that each project the image of a single star. The Sky Mask is a second dome to project stars that are only visible in the night sky on a particular date and time. The (5) other Constellation Masks fit over the other masks to isolate (5) to (7) different important star groups or constellations to making learning and identifying easy. There’s a Constellation Mask for each season, plus one for the stars of the northern sky that never set. All constellation masks can be adjusted to the different location of stars at different dates and times. The Space Theater audio CD mixes amazing scientific facts with ancient stories about the stars and constellations and comes with directions on how to use the constellation masks. The Night Vision Saver helps you view the star maps in the Space Theater guide or change the masks in the dark while viewing your ceiling display. This kit includes a projector base, Star Dome, adapter ring, audio CD, Sky Mask, (5) Constellation Masks, Night Vision Saver, (2) bulbs and 32-page instruction science manual. This Slinky Science experiment is number 158 of a series of science kits that combine the elements of learning and fun to provide hours of educational entertainment. The POOF-Slinky 06400 Slinky Science Space Theater Light-Up Planetarium is recommended for children 8-years of age and older. POOF-Slinky, Inc. is the maker of POOF, Slinky, Ideal and Scientific Explorer Brands.