1/4 Kim gave her son Saint a lift in the pool during their vacation. Photo: KimKardashianWest.com 2/4 Saint had fun in the pool with his mom in Costa Rica. Photo: KimKardashianWest.com 3/4 The reality star's son appeared fascinated by an underwater camera. Photo: KimKardashianWest.com 4/4 North played with her mom's hair in videos documented on Kim's Snapchat. Photo: Snapchat/KimKardashianWest © ¡HOLA! Prohibida la reproducción total o parcial de este reportaje y sus fotografías, aun citando su procedencia. Más sobre: Celebrity kids Kim Kardashian Saint West North West Más noticias sobre Celebrity kids El hijo de Justin Timberlake, Silas, hace una rara aparición en el PGA golf tour North West es el clon de Kim Kardashian y estas fotos lo demuestran Harper Beckham enjoys tea party with Princess Eugenie at Buckingham Palace Blue Ivy Carter makes rapping debut on dad JAY-Z's '4:44' album