Here's my very first 3D model every made! It doesn't do anything, but at least you can ride a pig with it, since it's a carrot on a stick. The program I used is Blockbench, and it took me about an hour or less to make, it wasn't that hard actually. It actually functions in my Tardis save, but that because mine is modified. More models coming soon!!!

To get the Sonic in game, type in the chat: /give @s minecraft:carrot_on_a_stick 1 25 {Unbreakable:1b}