Really, it means splash resistant–do not shower or submerge. This site was very informative for me and may be for you also:https://www.google.com/amp/s/www.thrillist.com/amphtml/gear/what-your-watch-water-resistance-numbers-mean

From the manufacturer

TImex Time Machines Kids' Watches Read more

Boys’ and Girls’ Analog & Digital Watches

Water Resistant up to 30 Meters

Timex Time Machines Kids Watch

Easy-to-Read Dial, Fun Rotating Graphics

Indiglo Night-Light

Water Resistant up to 50 Meters

All styles.

Labeled Hands & Minute Markers

Select styles.

Easy-to-Read Dial & Fun Rotating Graphics

Select styles.

Indiglo

Select styles.

Read more Time Machines app

Practice telling time with the free Timex Time Machine app. Your child will learn how to tell time, as well as other relevant skills in a fun and engaging world. This app is ad-free and kid-safe.

Available for iOS and Android.

Read more Timex Time Machines awards

Award-Winning Product and Free Mobile App