The AoI file contains all the parts to make a pair of child's sandals. You have to weld the parts together when you've made them - I just used a hot knife to melt the surfaces and pushed them together. Push a short length of 3mm polymer through the hole where the strap buckles and melt its ends flat like two mushrooms. The strap holes then fit over those to clasp.
As presented, the shoes would fit a child with feet 15 cm long. But it's easy to scale the design to change the size: just scale in X and Y; leave the Z values alone, or scale them by a lower factor.
File:Childs-shoes.aoi - Art of Illusion file for the shoes