How do I attach pvc or a dowel for center support to board to make a tall cake stay straight any help will be greatly appreciated.

You need something called a *flange* that will screw down onto your board to hold the pipe or PVC securely upright. It will be in the plumbing section near the pipe - just ask a salesperson. Be sure to get the correct size - like 1/2" flange for 1/2" pipe.

Thank you ibmoser