(Update: Per the White House press release, "The White House Easter Egg Roll is focused on promoting health and wellness with the theme, “Get Up and Go!” All of the activities will encourage children to lead healthy and active lives, which is a central part of the First Lady’s ‘Let’s Move!’ initiative, a national campaign to combat childhood obesity.")
As a final note, obviously, it's important for kids to eat healthy and exercise. Townhall's problem with Michelle Obama's program is that it's basically another smokescreen by which the government can 1)exercise more control over your life and 2)play the parent, which it thinks you are incapable of doing adequately (although it's a role government itself is incredibly inadequate for).
Considering the fact that the Obamas are for abortion, it's ironic Michelle chooses to discriminate against kids who have no voice for themselves in the womb, then makes herself a champion of their well being when they're older.