I am making a cake with the concept of the following picture/link. How would I attach the toy cars on the incline for them to stay put? Actually the mom will be attaching them since I cannot make this party, so I need to give her instructions.

http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1244185

A little dab of piping gel under the tires should work, but a toothpick would be easier and quicker. She can just place a toothpick wherever she would like to place the car. Under the cars, there is always a little space that the toothpick will catch on to. She can just remove each pick after she takes the toys off to serve.

u could use royal icing too. thats a great "glue"

I have done this with a toothpick for the toy cars and a cut wooden skewer for monster trucks. You can very easily hook the toothpick to the underside of the cars.

I did almost the exact same cake and used toothpicks for the cars.

I did the same thing, except I attached toothpicks/skewers (depending on weight of vehicle) to the underside of the car/truck using melted chocolate. Once the chocolate had set, I inserted the picks into the cake. The advantage of this is that the picks come back out with the cars.

Ahhhh thank you. I was thinking toothpicks, but it just seemed too easy, lol. I just kept telling myself it had to be more involved than that.

Thanks again!