With the high cost of college, many parents begin saving with 529 plans when their children are babies. Contributions to these plans aren’t tax deductible, but they grow tax deferred. Earnings used to pay qualified education expenses can be withdrawn tax-free. However, earnings used for other purposes may be subject to income tax plus a 10% penalty. What if you have a substantial balance in a 529 plan but your child doesn’t need all the money for college? Perhaps your child decided not to attend college or received a scholarship. Or maybe you saved for private college, but your child attended a lower-priced state university. What should you do with unused funds? One option is to pay the tax and penalties and spend the money on whatever...