I played it now with my kids. One aged four and one nearly six. We all had a blast. I gave them a sheet of paper and they drew everything that they did. We did six weeks in three separate sessions because it was really easy to stop or start.
I only had 3d6 so keeping track was a tad difficult. I had originally planned on using some sort od counter but I wasn’t able to so I just wrote out a number line and added to it each week and it worked alright. Having an actual pool of d6 would have really helped them understand what was going on though.
Anyway, highly recommend for play with kids.