Probably not until just before 4. Shes now almost 5 and knows all her sounds, reads any Cvc or cvcc word like sand, best, hats etc. She is also learning works like the, here etc that she cant sound out. She can read simple stories with ease and make reasonable attempts at writing words, eg; caruts for carrots, maws for mouse. Ive never pushed her either as I knew she wasnt ready before around 4. Her sister is now almost 3 and starting to show an interest, she can recognise some sounds.