Welcome aboard "jwoodall"
I think Burns Park is a great choice for a starting point.
"grandkid38" has done an excellent job of saturating this huge kid-friendly park with caches of almost every type and difficulty factor, that even include handicap-accessible (last time I looked).
I'm sure, as "Gaddiel" said, if you select low star ratings for terrain and difficulty the kids will have a great time.
Live a good, honorable life. Then when you get older and think back, you'll enjoy it a second time.