Lights.....don't shut off

Our son loves this dino. Only downside is the light timer doesn't work. We explained the situation to him and he was heartbroken to hear it would have to go back. We opted to keep this and my wife shuts this off manually after he has fallen asleep. We should have checked before giving it to him, but we expected it to work as well as the other 2 we bought, not so much.

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