She wore an itsy-bitsy, teenie weenie, ombre rainbow ruffle bikini.
In a series of shots posted by Simpson to Instagram, Maxwell posed in her swimsuit with a matching pink scooter – and black helmet, because, as the star pointed out, “Safety first.”
The Pastel Rainbow Ruffle Two-Piece Swimsuit from Stella Cove is currently available to purchase for $45 at Nordstrom.
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Maxwell seems to love spending time in the water: For her fifth birthday, the little cutie celebrated with a mermaid-themed bash.
The blonde beauty – who is her mama’s look-a-like – loves to strike a pose, and has mastered the lip pucker, as evidenced by Simpson’s family snapshots.
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Simpson shares Maxwell with her husband, Eric Johnson. The couple – who married in 2014 – are also parents to son Ace Knute, 3.