Description: Fine Motor Skills Twisting, tying, and untying knots strengthens hand-eye coordination and finger dexterity. Problem-Solving Skills Figuring out how to manipulate the knots encourages logical thinking and patience. Focus and Attention Completing knot challenges can help improve their concentration. Specifications: Material: Plastic A Size: 23.1 * 22.8 * 2.6CM B Size: 23 * 23 * 1.8CM Number of players: 1 or more Package includes: 1x Game board 10x Ropes 1x Storage bag OR Only 1PC Mini Bag(don't buy) .