1 RANDOM ROCK - magnetic hematite rocks. They can be played with or used as pretty magnets. Rocks are different sizes, but are about .75"-1" long. Rattlesnake eggs are a fun and educational toy. They are a pair of strong magnetic eggs that when tossed together make a loud rattling sound. You can throw them in the air, or push them together and the strong magnetic pull will make the eggs clank together and sing. Fun ways to play: Throw them up in the air and make them make contact in the air, then catch them. Place one magnet on the top of a thin table. Place the other underneath and make the top magnet move. Magic. Place 1 egg on each side of your hand and they will stick together. Fun magic Trick. Place one egg on the table, and slowly move the other one closer until the magnetic force grabs and pulls the other magnet and clattered together. Place a magnet 3 feet away on the table or floor.