A grizzly bear had a ball rolling down a huge hillside at Denali National Park in Alaska. Luckily for us, some delighted tourists caught his adorable antics on video!

Just like a little kid, the happy bear tumbles over and over again, and appears to be having the time of his life.

We’re wondering if he’s celebrating the National Park Service’s 99th birthday! Entrance fees are waived at all 408 national parks today to mark the occasion.

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