Boleh je, tapi sebaiknya check dengan pediatrician dulu sebab setiap baby lain-lain kesiapan dia, some of my mum friends started solids around 5.5 bulan, some tunggu 6 bulan, depends on baby's signs la like boleh duduk with support, interested in food, etc. If your baby dah nampak ready dan doc okayed it, boleh lah try simple bubur yang plain-plain je first, but always best to confirm with your doctor first kan.