Involving Grandparents

How is everyone involving their grandparents in their ceremony if at all. I unfortunately do not have any grandparents since they have all passed, but FI is very close to his paternal grandparents. Anyway I wanted them to walk down the aisle as part of the processional but as FI pointed out they do have some trouble walking sometimes. But is there anything else I could do, or maybe just mention them in the program in some way? Thanks

My 92 year old grandma is walking down that aisle! I am sure that my brother will escort her because she has trouble walking.

But, she will be the first person to go.

Then, Fi's mom

Then, My mom

Then, bridal party