An adaption for the current Juggle Boards (not the infinity Board) enabling a 90 degree turn. 
Four together will make a complete circle track. 
Incorporate with two long section and a base section of your Juggle Board to learn juggling patterns such as 'The Box'
 
The matierials used (PETG) are made from 99.5% recycled plastic water bottles, and our printers run on solar power.