It is possible that the main title of the report Marfan Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
As Jenny points out, being able to lisp the alphabet song at age two has little to do with 'knowing' the alphabet. And, yes, most children learn the letters by sight and sound in kindergarten, although most are capable of learning this information sooner if diligently taught by parents or others.
2 years old is a great age for teaching shapes. Start by identifying the shapes you see in the world around you. Your child should have a basic understanding of shapes by 2 Â½ years old and should be able to identify many shapes by the time he is 3. think this helps your child understand that numbers are different from letters. I recommend 3 as a great age to start teaching numbers, but just like letters, there is no pressure to learn them all fast. Your child should be able to count up to 20 and identify numbers 1-10 before kindergarten.