If you own a leapfrog printer you will know that the motor shafts keep beaking due to metal fatigue and bad design. 

Here is how you fix it.

You can get the files to fix your own printer here

Almost all commersial 3d printers are garbage, Leapfrogs creatr is no exception.

To convert a commersial pile of crappola, into a reliable functional piece of equiptment you need to do some major modifications to it.