Kanye West & Kim Kardashian Throw Cuban Dance Party, Kids Steal the Show

Kim Kardashian brought out her cleavage 'A' game for one of her last nights in Cuba -- but she got upstaged by her own daughter's dance moves.

Kim and Kanye West and the rest of the krew packed in a ton of activities before jetting off the island -- touring a bird sanctuary, an art gallery ... and a private dinner party, complete with salsa dancing lessons.

Check out the pics -- North, Penelope and Mason made grandma Kris proud. There will be another generation of 'KUWTK' ... for better or worse.