North West and Co. Have Squad Goals, Havana Style!

Kim and Kourtney Kardashian's rugrats are digging the Cuban life.

North West, Penelope and Mason Disick had some fun in the sun at an "amusement park" in Havana ... remember everything's very retro down there.

The family is shooting 'KUWTK' on the island, and while the kids have their goals ... the moms do too.

¡Viva el culo!