Steve Irwin's children are continuing to cherish moments they shared with their father.
The late "Crocodile Hunter" star would have celebrated his 60th birthday on Feb. 22, prompting Bindi Irwin and Robert Irwin to pay tribute to their dad on Instagram with throwback photos of happy times.

"Happy birthday Dad. I love you and I miss you more every single day," Robert captioned a photo of himself riding a motorcycle with his father inside the Australia Zoo. "My earliest memories are my fondest, thanks to you. Hanging on tight to the handlebars of the motorbike, when you'd take Bindi and I on your morning lap of the zoo – before going to get ice cream for breakfast."
He added, "Every minute spent with you was a blessing. I'm gonna ride that lap on your old motorbike this afternoon."
Robert was only 2 years old when his father died in 2006 after being stabbed in the chest by a stingray's barb while working on the documentary series "Ocean's Deadliest." He was 44.
Robert's sister, Bindi, was 7 years old when her dad died. She, too, took to Instagram on Tuesday to honor Steve, calling him "the greatest dad and Wildlife Warrior."
Referring to her 11-month-old daughter, Bindi wrote, "Today I'll watch 'The Crocodile Hunter' with Grace Warrior and share stories about her incredible Grandpa Crocodile. I love you with all my heart. Your legacy lives on."
Bindi, 23, also posted a series of images of her dad on her Instagram Story.
Over the years, Bindi, Robert and their mother, Terri, haven't shied away from remembering the reality TV star. The family has dubbed Nov. 15 Steve Irwin Day, a date they publicly celebrate annually.