Just match, flip, and check. Each colorfully-illustrated 25-piece set provides a perfect avenue for young children to learn about the wonders of the world around them. Aligned to state and national science standards, magnetic FlipChex are self-correcting and easy to use. Just place the five answer cards, flip the game strip, and check your answers. Color-coded game pieces make clean up easy. Planets, our Solar System, satellites, stars, and galaxies; what happens when the Earth rotates; phases of the Moon, and amazing celestial facts to tantalize budding astronomers. 25 piece set with 4 different magnetic activities.