Tyga and girlfriend Kylie Jenner went all out for his son King Cairo's fourth birthday party just a day after his mom, Blac Chyna, threw him a similar bash.

The Ferrari-themed shindig, which was held at the 19-year-old's new mansion, included a racetrack, ferris wheel and inflatable slide.

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Kylie took dozens of snaps during the event, many of which showed the beauty mogul macking on her 26-year-old beau.

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The Kardashian family, including Kourtney and her kids as well as niece North West, were on hand to celebrate the tot, who's about to become a big brother to Chyna's baby with fiancé Rob Kardashian!

Scroll through the gallery below to see more photos from the fun-filled party.