CHICAGO (CBS) — It’s the very first summer for babies in the neonatal intensive care unit at Lurie Children’s Hospital – and they’re ready for their close-ups.

In an event organized by the NICU child life specialist, the babies’ families celebrated the unofficial start to summer this Memorial Day weekend with a Splish Splash NICU Bash.

The babies were decked out for the occasion – with shades, bandanas, beach balls and all – and a word of advice to stay cool.

The hospital sent us the photos below.

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

Lurie NICU Summer Photos

(Credit: Lurie Children’s Hospital)

CBS 2 Chicago Staff