When my 2 ( 11 1/2 months apart) were little they didn't want to go "down" for a nap either so I would join them. Read a story, some soft dreamy music, and we'd all drift off. I know I at least sure felt better the rest of the day for having had some Zs. I can't imagine dealing with little ones who are sleep-deprived and I'm sleep-deprived... what a nightmare!!
As Donald Duck always said, for ALL situations, "You catch more flies with honey than you do with vinegar."
PS: Medical science recently "discovered" that people ALL NEED to go vertical and rest/sleep for 1/2 hour at midday. What's wrong with us, running around despite our body pleading for mercy, and allowing our children to do the same?? Heck, the French have always had their duez a quatre (2-4)!! :)