My wife and I having problem in taking our kids to bed during afternoon wahh!! they keep on playing instead of taking sleep. What should the best thing to do for them to be motivated to grab some sleep?

Here are a few tips and tricks on how to get a kid take a nap: http://www.care2.com/greenliving/7-tips-to-get-your-toddler-to-nap.html If all else fails, maybe it's best to just let them be. They reject naps probably because that's how their body clocks work. Just ensure that you make them complete the recommended sleeping time for their age.