Will you continue your child's saving account, or put together with your own savings account with higher interest rates?

I opened a mighty saver account with OCBC to deposit my child's money for saving. However the interest rate is very low, now i'm thinking should i put together with my own saving since my interest rate will be higher? I'm thinking this will be better but afraid i might have missed some points, like there's actually some pros to maintain my child's money in the mighty saver account. Could anyone enlighten me please before i close it. Thanks!