Have Extra Time in 3d design?

Here are your options:

1. Create an add on or accessory to your design. Can you take it further in some way? Add on? improve? add decoration?

2. On a computer explore any of the 3d Design tools listed below.
On the web:
Tinkercad
3d Sculptfab
3d Slash
Vectary
Homestyler

Installed on the computer (start menu)
Blender
3d Crafter
Paint 3d