Disney Infinity

I've done this in the Toybox ...

You first need a car (Cars Pack or Incredibles for example) and the fan (I unlocked it in the Disney Infinity Vault).

Go into the Toybox and placed the fan (several are better).
Now you have to jump the car to the fans that the car floats in the air. Now you can perform many tricks (with the right stick).
It is important that you remain in the air for as long as possible, make a lot of tricks, and then you land the trick clean (otherwise it does not count).
It may can be that you have to do after landing still a little trick on the floor that you see the experience.

With this method I have used approx one hours per character to level 15th.

Another tip: do this in a complett empty Toybox. Then there are no opponents.

I hope i could help.

PS: Sorry for my horrible english

Thanks to vSully for making this Video:

This guide is for the few that can not seem to get the fan (like me). I have tried and tried and only have a few more levels to get and still no fan -.-

Load a prebuilt/ empty toybox then go to the landscapes build page.
choose the next size down from the largest.
line it up to one of the sides of the existing land and raise it all the way up to the top of the map.
place the infinity hub on this top platform making sure that the purple and green sides are facing the existing land (the one at the bottom).
Then simply spawn a car at the top and drive it off the edge.
do the tricks in the air making sure the alternate the tricks (you get more points)
when you land at the bottom be sure to jump and do 1 more trick so it registers the points.
Then simply drive off the edge.
This will spawn you at the top.
Rinse.
Repeat