Gup F Connector
thingiverse
This should fit the cross-shaped holes in the Gup F toy. Attach to other models like https://www.thingiverse.com/thing:3506055 to create new pieces.
Download Model from thingiverse
With this file you will be able to print Gup F Connector with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Gup F Connector.