推荐理由：
这首脍炙人口的童谣，节奏欢快，琅琅上口。这首歌曲对节奏感要求比较强，能够很好地训练孩子的音乐节奏感，以及眼睛、手和脚的协调性，能更好地促进孩子的社交互动力。唱这首歌的时候可以把全家人甚至周围的人都发动起来，唱歌的人越多气氛就会越活跃，宝宝也就会越快乐!唱歌时一定要让宝宝配合肢体动作，让他们充分地融入到这种快乐的氛围中。具体做法如下：
If youre happy and you know it,
Clap your hands.(唱完这一句拍两下手)
If youre happy and you know it,
Clap your hands.(拍两下手)
If youre happy and you know it,(双手在胸前交叉摆动)
And your face will surely show it，(伸出两个食指从嘴巴往上划，做微笑状)
If youre happy and you know it,
Clap your hands.(拍两下手)
If youre happy, and you know it,
Stomp your feet. (跺两下脚)
If youre happy, and you know it,
Stomp your feet. (跺两下脚)
If youre happy, and you know it,(双手在胸前交叉摆动)
Then, your face will surely show it.(伸出两个食指从嘴巴往上划，做微笑状)
If youre happy, and you know it,
Stomp your feet. (跺两下脚)
If youre happy, and you know it,
Shout Hurray!(双手举起来做欢呼状)
If youre happy, and you know it,
Shout Hurray! (双手举起来做欢呼状)
If youre happy, and you know it, (双手在胸前交叉摆动)
Then, your face will surely show it.(伸出两个食指从嘴巴往上划，做微笑状)
If youre happy, and you know it,
Shout Hurray! (双手举起来做欢呼状)
If youre happy, and you know it,
Do all three.(把拍手、跺脚、欢呼连起来做一遍)
If youre happy, and you know it,
Do all three.(把拍手、跺脚、欢呼连起来做一遍)
If youre happy, and you know it, (双手在胸前交叉摆动)
Then, your face will surely show it.(伸出两个食指从嘴巴往上划，做微笑状)
If youre happy, and you know it,)
Do all three.(把拍手、跺脚、欢呼连起来做一遍)