A model of roller skate parts meant to attach on a Toddler's size 4 Vans Sk8-Hi shoe

Note: This is ONLY meant to be a model for display purposes. this is not for use as an actual skate. It probably wouldn't be able to handle a child's weight, it's only held onto the shoes in the example photos with double-sided tape. please don't try to actually use this, because it'll definitely maim a child.