Tarek El Moussa has opened up about the challenges of fatherhood in a new post.

The 35-year-old "Flip or Flop" star said Thursday on Instagram that his number one goal is to be "the best dad" to Taylor and Brayden, his 6-year-old daughter and 23-month-old son with ex-wife Christina El Moussa.

"Well...my kids go home today and I'm sitting in my car on set as I write this," El Moussa wrote.

"Being a dad is not easy...it takes love, hard work, patience and the understanding that everything you do today around your children will affect them for the rest of their lives."

"My number one goal in life that I WILL accomplish is being the best dad, friend and mentor to my children. I just love them so much and I want them to live the best life ever! I [love] you Tay and Bray!!" he added.

El Moussa gave fans a glimpse of Taylor and Brayden while doing a photoshoot with the pair on a boat this month.

He shared several posts from the outing, including a video of himself and his kids enjoying the boat ride.

"Being a father to these two amazing kids is the best feeling in the world!!" the star wrote at the time.

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El Moussa and Christina announced their split in December after seven years of marriage.

Christina, who will continue to star with El Moussa on the HGTV series "Flip or Flop," said in February that their kids are doing well.

"Despite everything, our primary focus is and always will be our kids," she told Good Morning America. "We continue to work together."

"Our kids are transitioning well," the star added. "Tarek and I are friends, and we have a lot of support from our family."