I have found it to be a great program for drawing up tracks as well as many other items such as house extensions and slot car chassis, you can view a drawing in 3D if its drawn correctly - emachine help files and hints will correct a drawing easily if you have any errors.  If you want to save a picture to view it or send a picture to someone that doesn't have the emachine program select  ( -shift button -print screen then open microsoft paint and select paste ) from there the image you have drawn can be saved as a bitmap or JPEG so you can send it via email easily.  I have no autocad training or architectural drawing background but managed to use the program , so have a go at it yourself .

A few track designs based on smaller table sizes 3 or

 4 lane layouts around the size of a ping pong table

Using 3 base sheets 1.8 x 1.2 .    Total table size is no larger than 3.6 x 1.8 

Simple layout with a 3 metre long straight running diagonally across the table

A little more complex with a bridge overpass (not drawn in)

Based on 3 sheets 1.5 x 1.2 but slightly narrower total table size 3.6 x 1.5

This would work with the long straight against a wall

Based around the idea above but slightly wider table size total table size 3.6 x 1.8 - bridge not drawn in

 Timing hardware from a large manufacturer of "plastic" track could be adapted or set into the timber track to allow for some simple lap timing - If the piece of plastic track that houses the timing hardware was to be recessed into the track to become part of the lane. A plastic track power supply could also be adapted to run these smaller layouts

This track is based on a 2.4 x 1.2 sheet  ( 1 lane )

This idea below is based on a 1.8 x 1.2 table size where the driving station / area is in the cut out section which allows an easy reach over the track to grab a de slotted car . The design could be adapted to 2.4 x 1.8 and two lanes it could allow two kids side by side in the driving area . Some areas of the track layout will need the two lanes to squeeze in tight together to fit in the shape and widen out in some areas to allow cars to pass each other  

The pictures below are based on the track idea above with nothing more than a different track layout that has a bridge overpass in it or wider corners. The area that the drivers would be sitting is ideally at the bottom edge of these pictures .

This idea is set out to have a longer sweeping drift corner then 3 switch back style corners , good for teaching kids some throttle control before they get onto a larger track with the bigger kids

Just another variation of a continuous drift through corners and can be run in either direction. but best is to enter under the bridge then slide around and over the bridge.