Expandable Collapsible Ball

A fun project that simply snaps together to create a ball (based on dodecahedron geometry) that will smoothly expand and collapse in a mesmerizing way. Enjoyable to use in your hands, and strong enough to even toss around.All parts are designed so that they can be printed without supports or brim, and you'll need to print 60 arms, 20 three-way connectors, and 12 five-way connectors to assemble. The version shown in the pictures uses the 6 cm arms, which creates an expanded shape around 25 cm. But, additional arm lengths are also provided if you'd like a larger version.Assembly Tips:It took me about 30 minutes to assemble, and there are likely many ways to do it - but here's what I did: #1: The top/bottom connector pieces are designed with a small snap-together locking mechanism, and therefore you simply need to place the arm pieces and then firmly squeeze the top and bottom piece together.#2: Assemble all 20 sets of arms using the three-way connectors independently.#3: Conn