Parent and child playing together: http://www.modernmom.com/8bc4b0d6-3b35-11e3-be8a-bc764e04a41e.html
Surprised girl: http://www.123rf.com/stock-photo/child_surprised.html?mediapopup=49363943
Happy boy: http://www.babycenter.com/0_how-to-raise-a-happy-child-ages-2-to-4_1492443.bc
Crying boy: http://prekandksharing.blogspot.com/2013/03/the-embodiment-of-words-emotions-and.html
Happy girl: http://www.momjunction.com/articles/smile-quotes-that-will-make-your-day_00389059/#gref

The word cloud was created at: https://tagul.com/