DIY: Pool Noodle Race Track

Buy an extra large diameter foam pool noodle.
Cut the noodle in half with a serrated knife (one side than the other side or electric knife you can cut straight through both sides)
Once the noodle is in two pieces lay them on the ground side by side
Insert toothpicks where the two halves of the foam noodles touch each other
Use as many toothpicks as need to hold the noodle tracks tight together
Now you're ready to decorate your track.
Using cardstock and toothpicks, create small flags for along the sides of the track.
Again with cardstock cut to size,  stamp or write Start and Finish then cut wooden or bamboo skewers down to size leaving the pointed end exposed (makes it easier to insert into the foam). Use fast drying Tacky glue to put the two pieces of cardstock together with the cut ends of the wooden skewers sandwiched in between. Place at the start and finish of track.
Finally prop the track up on a chair, table, bed, pretty much anything, but the higher the prop the faster your matchbox cars will go.

Source: www.ramblingsfromutopia.com