Beanies for the boys

This weather is crazy, I packed my knitting things away weeks ago, since its been raining and coldISH, out they came again.
 I wanted something fast and easy so made some beanies for the boys, (I have 4 grandsons and another being born in March) and a grandaughter who just turned one.
 Does anyone in blogland know how to knit a erm..popple thingy to sew on top of the finished beanie? you know the "thingy" "stemmy" bit that makes them look like a gumnut LOL