Kendall and Kylie Jenner might win the prize for Kris Jenner's favorite children! The youngest in the Kardashian-Jenner clan really upped their game this Mother's Day. 

First they dropped off a gigantic bouquet of white flowers, which the momager posted on Instagram. 

"Mothers Day Flowers!!!!!! Thank you @kendalljenner @kyliejenner for the amazing love today and every day... 2 of my most precious blessings are these 2 babies!!! #doesthismeanyouguysaredoingthedishes tonight? #flowerssobigtheywontfitonatable #happymothersday #familyfun beautiful @marksgarden !!!" she captioned the shot. 

And the girls didn't stop there. They set up an enormous balloon sculpture in the foyer of her Calabasas, Calif. mansion that read, "I [heart] Mom." 

"And then THIS arrives!!!!!!!!!! Whoa!!!!! Thank you @kendalljenner @kyliejenner !!! I love you both so much #ikindofhavethebestkidsintheworld #loved #overwhelmed #family #blessed," Jenner captioned a photo of her gift. 

The mother of six and grandmother of four posted several positive messages for the holiday on Instagram, writing, "Happy Mothers Day to all the Mommies out there!!! I have been a Mom for as long as I can remember.... And it's the biggest blessing I will forever cherish as long as I live....the memories are priceless...mommy and me classes, ballet, karate, carpooling, room mother, soccer coach, brownie leader, chef, therapist, birthday parties, celebrations, getting through anything thick or thin, good or bad... Together!!!! the list goes on and on but now I am also blessed with being a Grandmother....nothing means more, no one I love harder than these amazing fabulous children and grandbabies of mine and I'm so proud to be their Mom.......#thankful #grateful #loved #Mama #Grandma #Lovey."

She also shared a shot of Rob Kardashian, who has been purposefully out of the spotlight in recent months since skipping his sister Kim Kardashian's May 2014 European wedding. 

"My boy #soproudtobehismama#hisisthesweetestheart #blessed #grateful," she wrote.