Jennifer Garner Says 'There's No Better Feeling' Than Cuddling with Her Son Samuel

For more on Jennifer Garner, pick up this week's issue of PEOPLE, on newsstands Friday

Jennifer Garner‘s kids are growing up, but her youngest still enjoys a good cuddle.

“I sang to my son last night. I sing putting them to bed every night,” the Camping star, 46, says in this week’s issue of PEOPLE of son Samuel Garner, 6½, plus daughters Seraphina Rose Elizabeth, 9½, and Violet Anne, 13 next month.

And her tune of choice would make Kermit the Frog proud.

“I have sung ‘Rainbow Connection’ probably 16 million times but I definitely mix it up,” she reveals. “That one is definitely a staple — if all else fails, ‘Rainbow Connection.’ ”

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While the former Alias actress is certainly busy in her flourishing career, she always makes time for her kids — in fact, her routine with Samuel is a “part of every night.”

“My son is the last one little enough to still be sung to, although I will whip it out for the others if I feel like they can use a little soothing,” Garner shares.

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“We’ve read, the lights are out, he’s folded up on me, there’s a favorite blanket, he’s on my lap and I rock him and sing ‘Rainbow Connection,’ ” explains the mother of three.

“It’s so soothing,” says Garner, who shares her three children with ex-husband Ben Affleck. “There’s no better feeling than a little kid in your lap while you rock him and sing to him.”

For more on Jennifer Garner, pick up this week’s issue of PEOPLE, on newsstands Friday.