Folding 12-inch Square Magnetic Black Board Travel Case with 2 Surfaces for Playing Games & Creating Designs with Grimm's Mini Magnet Creative Puzzles Wooden case is about 12 inches square when closed/folded shut Opens to reveal two 12-inch square metal blackboards Use with one or more sets of Grimm's Mini Magnetic Creative Puzzles or other magnets Case will preserve your working designs to finish later Made of beech wood, black metal plates (inside), and outside is gently colored using only non toxic, water-based, child-safe stains