Kim Kardashian shows off figure in tiny bikini as she dives into lagoon with her kids [photos]

Kim Kardashian enjoyed a fun day out with her kids as they took a dive in a blue lagoon.

The Keeping Up With The Kardashians star, 39, took to Instagram to share a sweet clip of her jumping into the lagoon's pristine waters before her eldest kids North and Saint followed her in.

Wearing a tiny purple bikini, Kim opted to leave her Yeezy crocs on as she took a plunge for a cool off.

North, seven, was next up as she jumped in the water before being caught by Kim who was already below.

Saint seemed hesitant to follow his sister in, and needed some convincing and words of encouragement from Kim.