Credit: Instagram

They just grow up so fast! It seems like only yesterday Kailyn Lowry was giving birth to baby Isaac at the tender age of 16. And now that the tot is 3 years old, it’s natural that Kail would want to look back.

On July 18, the Teen Mom 2 star posted this adorable split photo of Isaac on Instagram saying, “Still sleeps the same as he did when he was 6 weeks old.”

Isaac’s rocking the perfect angelic pose with one hand placed sweetly under his head. As all TM2 fans know, this precious tot is the son of Kailyn and baby daddy Jo Rivera. Though their relationship clearly didn’t work out, Kailyn’s now married to Javi Marroquin and loving life.

In fact, Kailyn and Javi are expecting their first child together. And though we know few details, we’re sure Isaac will be a caring big brother.

Personally we think Isaac looks a lot like his dad, but what do you think? Does he resemble Kailyn or Jo more? Tell us below!