eating problem

Hello po. Naranasan nyo na po ba na ang anak nyo n kumakain nmn rice ay bigla nlng ayaw na. Like in my case, I have a 2-year old son, these past few days bigla nlng ayaw kumain ng rice.As in panay luwa nya sa sinusubo smantalang twice a day kumakain nun. I dont know what to do.??