No no no no no...... you pour the batter directly INTO the cone.
I don't know if there is a special way to do it, and I'm sure that someone sells some contraption that you're supposed to do it in, but all I did was stand them up on a cookie sheet. Pour the batter into the cone (of course, only about half to 3/4 full, as normal cupcake liners), and VERY STEADILY.... put the cookie sheet into the oven. That's the hardest part. You just have to make sure to pat the cone on the counter before you fill it... some cones have the flashing on the end... a little bit extra that will make them fall over if you don't break it off.
All I did was line them up on the table... the kids don't really care if they are displayed prettily or not. They like them in their HANDS!
PS... just read the response from LeeAnn C... the Cool Whip and sprinkles sounds AWESOME! Sigh... now I may have to make them just because... Hahahaha