Welcome! Thank you for your question.
You can do this in your will. You would need to put in your will a spousal income only trust. This is a trust inside your will that would designate that all income from the trust will be distributed out to your wife, the property remains in the trust and the trust distributes the property out to your children at the death of your wife.
You will have to name a trustee to control the trust until the death of your wife. Your wife cannot be the trustee since she is the beneficiary. One of your children or a third party can be a trustee.
I cannot provide you with legal advise. I have provided you with information about the law related to your question. My answer, and any information that you find online, should not take the place of having a consultation with a lawyer in your area to advise you regarding your specific issues.
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