Absolutely! There are two I usually recommend.
Minwax polycrylic protective finish
https://www.amazon.com/Minwax-222224.../dp/B017NNJYBW
and
AgraLife Kennel Seal
https://www.amazon.com/AgraLife-TriC...seal+non+toxic
Both are water resistant but I personally find Kennel Seal seems more durable than Minwax.
If you ever want to expand to larger projects I also recommend #50 Shield's All, which is waterproof. I got myself a gallon to use on my current project so I still have to see how it compares but I've seen it highly regarded.