[Gary Brantley]

Yes, it helps immensely woodcote!   Thank you so much for taking time to help.   I am only about 50 years out of the loop and need a lot of help catching up; I do appreciate it.   In two years, I'll have a 5 and 6 year old granddaughter and two 8 year old grandsons.    I can just see that lot racing each other at the same time, so the 4 lane idea is attractive for sure.  They can start now, as each is able, and sort of grow with the set for a few years.  I've been looking at the AFX - Super International (MG+) set and it seems to be well reviewed with some neat features. There are features of the digital tracks that sound very interesting too.   I'm not too sure about the sportsmanship of my four untamed grandkids when it came to stacking up and blocking, lol.

Size is definitely a consideration as well; still not sure how we'll handle that issue here.   I might have to get really creative with that one.
I've got a lot to consider and a lot to learn, and I'm sure I'll be back with a list of questions before I decide, so please bear with me!  Thanks again for all the help thus far!