One of my favorite lines is 'Trick them into learning'. Some worksheets are just more fun to do than others. Here are a few I've selected that make learning more fun for young learners:
Whenever possible, try to avoid the same old drill type worksheets. If you can find worksheets with a bit of a twist in the form of a puzzle, young learners are more apt to embrace and engage in them. However, there's always a time for some drill to learn the facts - just remember to keep it fun!

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One reason that children does not like math is that they constantly been asked to work on boring worksheets. One way to “trick” them into doing is to integrate game into math. Ho Math and Chess has successfully integrated chess inito math and thus makes math worksheets more fun for children to work on. Details, visit http://www.mathandchess.com.