6 month baby is not laughing...

If your worried that your child isn't hitting the milestones at a certain age your child could just be a late bloomer. As long as your baby can smile and interacts with you there shouldn't be a big concern.
How your child plays, learns, speaks, and acts offers important clues about your child’s development. Check the milestones your child has reached and talk with your child’s doctor at every visit about the milestones your child has reached and what to expect next.
Language/Communication:
Responds to sounds by making sounds
Strings vowels together when babbling (“ah,” “eh,” “oh”) and likes taking turns with parent while making sounds
Responds to their own name
Makes sounds to show joy and displeasure
Begins to say consonant sounds (jabbering with “m,” “b”)

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Moms Expertise
    04/18/14
    This is a great answer. I think I would just add that if a parent is worried, more direct-attention face time with baby would never hurt. :)
    1
    04/18/14
    Yea!
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      04/18/14
      Comment deleted
      04/18/14
      Thank you Kim!
      1
      04/18/14
      My daughter giggles a lot.
      1
      04/18/14
      We have he same exersaucer!
      1
      04/18/14
      the*
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        04/18/14
        8Theresa Gould
        Great check list!
        1
        04/18/14
        Thank you Theresa!
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        04/18/14
        Thank you I agree, some babies learn ate different pace. I'm glad Selena can laugh and giggle.
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        About Lindsay
        Birth: April 11
        On Moms.com since: Dec 24, 2013
        ~Team Player (Baby)~ 32 years old, married. SAHM. I love my husband and daughter so much!