Summary: If you are interested in Chinese knots, this ball would be definitely a attraction to you. It is basically a finger weaving method. And your left thumb and little finger along with right hands play a significant role in tying knots below.
To go with MFW:ECC Castles @ Germany How to build an easy catapult for kids and learn about tension. Build a simple LEGO catapult with basic bricks. Fun STEM activity for kindergarten and grade school kids.