1031 exchange investment options other than physical property?

[J Chouinard]

Hi all, 

Looking for some info. We are in the process of a 1031 exchange. We may have a small amount that is not going towards the purchase price of the properties. I know in the past you have been able to invest in things such as REITs etc. I believe the laws have recently changed for that? Are you no longer able to invest in anything besides physical property for a 1031? Hard to find clear, current information regarding that.  We may only have about $10K if that. But of course,if we could invest it in some way instead of being taxed now we would consider it.  

Thank you. Appreciate all the info I have learned here!