Acreage Wanted for Grandson

.
.
Looking for a parcel of acreage ( in Michigan ) as an investment for my Grandson ( now 13 years old ).
Must be vacant ( no dwellings ), have legal road frontage.
To be used possibly for camping or hunting, in the future,.
.
.
.
.
.
.
.
but currently, will remain fallow, with plants to benefit Butterflies and other pollinators Must be 10 acres ( square ) , or a 20 or 40, or ?? with legal road frontage