Barrett recently discovered how to work the glider on his swingset. He used to want us to push it for him and one day, he climbed up and figured out how to push with his feet. He loves it and yells "ZOOOOOOOOOOOOOOOM!" the whole time he's riding it!
Yeah, he's totally wearing his Thomas the Tank Engine jammies and his rain boots on the wrong feet.
But he's having fun, so who cares, right?