01/12/2012 04:29 pm ET

Britney Spears' Kids Sean Preston & Jayden Have Gymnastic Fun (PHOTOS)

Britney Spears' boys are growing up!

It seems like just yesterday the popstar was welcoming her sons into the world. The 30-year-old singer is clearly a proud parent and wanted to share a couple photos of Sean Preston, 6 and Jayden 5, with her 12.3 million Twitter followers.

On Tuesday, Britney tweeted a photo of Sean Preston, who she called her " little Hercules,' in his gymnastic class:

The next day, she tweeted a photo of Jayden playing on a trampoline:

Britney's boys are about to officially welcome a new member to their family, when Britney weds fiance Jason Trawick.

"Jason is just amazing with the boys," Britney told Us Weekly. "They look up to him so much -- they adore him. He's their hero."

Even the boys' father, Britney's ex-husband Kevin Federline approves. "I think he’s a great guy. The kids speak highly of him. Her family loves him," he said.

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