Setting up a custodial account can help adults gift assets to help children become financially independent, but there are important considerations. [1] There are two types of custodial accounts - UGMA and UTMA - which differ in the assets that can be gifted. [2] Gifted assets are irrevocable and taxes may be owed by both the child and parent depending on account earnings and the child's age. [3] The child will gain full control of the account at age 18 or 21, so the funds may not be used as originally intended by the parent.