DO NOT NAME ANY MINOR CHILDREN as beneficiaries !!!
Let me share our experience with inheritance money designated for our children. In the 1990s my husband's aunt passed away, naming our 3 minor children as beneficiaries to several annuities. This was supposed to be college money - great! We were very thankful! However, in order to actually transfer the money, my husband and I had to be named - in court (see attorney fees and court costs here) as our own children's court appointed guardians. They had to send out notices to all our family members - in case someone wanted to contest that. BTW, the attorney told us we were fortunate that they had done us a favor and presented the three cases together - as one - instead of three separate pleas so we save some money. yay.
So, now we are the court appointed guardians. We can now accepted the money one of two ways. We can post a bond ($$$) or deposit in a fully insured saving account (low interest). We didn't like either one of those choices so we petitioned the court (more attorney fees and court cost) to deposit the funds in mutual funds. Several investment firms we talked to REFUSED to handle a guardianship account but we finally settled on Thrivent - where we, and the boys, already had accounts. That done, we still had to report to the court EVERY year so they could see we weren't using their money for our own personal gain. BTW - IF we wanted to deposit any more money or make a withdrawal - we had to go back to court for approval. (More attorney fees and court costs) ALSO, if, when they turned 18 and decided we had mis-handled those funds, they could easily SUE us, their parents, in court and win.
So, when each child became 18, we had to go back to court to dissolve the guardianship - more attorney fees and court costs. Fortunately we were able to salvage most of the inheritance and all three graduated college with degrees in IT, engineering and mathematics. It was worth while but could have been SOOOO much simpler had it been done differently. We have a great rapport with our sons so Auntie could have left the $$ to my husband and I with instructions and we could have done without the attorney fees and court costs. I realize that not everyone is as trustworthy or conscientious but there has to be a better way to do that!!
A trust would have worked BUT, since Auntie named the children by name, and not a trust, we could NOT create a trust after the fact.
SO, please be careful and ask a lot of questions!!! I caution you NOT to burden the parents to leave much appreciated money to your grandchildren. I have read, more recently, that IF you pay their college tuition - directly to the college, you can take the tax deduction for that. Just a thought.