Explore beautiful 3-D patterns created by a magnetic field--mess free! Sealed plastic display tube enables 360-degree viewing. Keeps iron filings clean and safe. Just insert the magnet into the center chamber. Includes display tube with encased iron filings, alnico cow magnet and multilingual activity booklet. Details:Clear & black5.13" x 3.5"Iron filings are enclosed making them mess-freeDisplay tube allows for 360-viewingComplete with Alnico cow magnet and bookletAges 6 and up Grades K+