It was playtime for the stars and their kids last week, with trips to the park, beach, and even Legoland! Jennifer Garner took Violet and Seraphina to a pajama party at a friend's house in LA, and Heidi Klum hit the slides with Lou and Leni on her lap. Brad Pitt and son Knox had quite the outing at Legoland in England, where Gwyneth Paltrow was scooting around with Apple and Moses. Click through to see the other fun activities celebrity babies had going on.
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