Easement + Life Estate...?

I live in Ohio and I have a life estate on my property with "the remainder interest to the children of [me]" (exact wording from my deed). Some of my children are over the age of 18.
If a company wishes to purchase an easement on my property, can they? I know my children must be the ones to sell the easement, but I can still have more children, so who knows how many people actually own my property?
Also, If I were able to sell an easement, would we have to hold the money until its determined that I won't have any more children? - Is this your question? Add additional information