He has air inside him??

We had a little get-together last night for Avi's b'day most of his close friends and their respective parents came over. Ofcourse, Ms. Susan was the chief guest as always! Anyway, Susan brought over some balloons (yellow in particular because Avi loooves yellow). We had some left over balloons this morning. Avi was blowing his balloon up and Diya goes, "He has air inside him, I don't." Mainly because she was having trouble blowing her balloon up! She finally found out that she does, indeed, have air inside her too!