Bruce Jenner -- Gets 'Me Time' for Father's Day ... Famous Kids Too Busy

Bruce Jenner got the gift of peace and quiet for Father's Day -- whether he wanted it or not -- because his celeb spawn are busy making money.

Bruce was flying solo when he hit up Starbucks in Malibu Sunday morning looking bored -- or maybe just well rested.

Instead of doing brunch with dad ... Kendall and Kylie Jenner are in Toronto to host the Much Music Awards tonight.

And Brody Jenner is hosting a pool party in Atlantic City.

Don't feel too bad for Bruce ... Kendall posted a pic this week saying the family celebrated Father's Day early with a few rounds of golf -- and don't forget, he has 3 other biological kids AND the K sisters to bug hang with today.