I learnt to tackle the above situation by an incident that happened way back when my child was a toddler.
He received a return gift, which was a fisher price racing car. It was identical to the one he already had thus, did not bother to open the wrapping.
I placed it on the shelf with the hope that once the existing car wears out with dents etc. I will open the new one.
Needless to say, my child was always interested in that wrapped toy car and kept asking me to open the wrapper for him to play (that is an obedient stage, when they take permission to open things!!)
I kept avoiding the conversation and insisted that he play the one in his toy bin. He would listen, but now and then the question would arise.
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