Kids Toy: Wrench (Spanner) and Bolt Box is a great model, but the wrench was not fun enough for my daughter. I made a adapter so it can be used with a drill. I made real tight margins on the part connecting to the drill, so that it would not fall off. Had to use some force to get it on, but held on great. 

Only tested in PLA. 
I printed with solid 100% infill.
8 layers
0.2mm layer height, 
0.4mm nozzle 
Printed on the Prusa mini. 
Printed as cover photo. No need for support, but i did use a inner brim so i would not wall off the build plate.