If you mean to be able to jump over them you need to set up a ramp in front of them, thats how its done in most if not all the drag style tracks. the only problem is that you will need the full registered version (1.4) of Traxx to be able to do this... if you have 1.4 just create an object box then view its properties and in the "type" drop down box select "ramp" then just size it and position it to get the jumping effect you want.
if you just have version 1.2 there is another way but the effect may not be exactly what you are looking for but go ahead and see for yourself... to do this create an object box then resize it and angle it into an invisible ramp in front of the pyramid, if set up right you should be able to bounce right over them...
have fun
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Malibu350