We have a souvenir from a Caribbean cruise we took a few years ago. It is a carved wooden frog with a ridge down its back. It has a wooden baton just like that that it holds in its mouth. You remove the baton from its mouth and draw it down the ridges on its back and it is supposed to sound like the chirping sound the frog makes. We bought it from a street vendor in Roatan, Honduras.
Very much like this: little wood frog rasp around 4" long from thailand factory https://www.amazon.com/dp/B00NP80XMO/ref=cm_sw_r_cp_tai_zh7EFb7VPAS1V
I was gonna saw the wood frog rasp things + reverb but hell the comb’ll.
This is what I’m referring too: Deluxe Large 4" Wood Frog Guiro Rasp - Percussion Musical Instrument Tone Block - by World Percussion USA https://www.amazon.com/dp/B00NP80XMO/ref=cm_sw_r_cp_api_glt_fabc_YV76YN474DW6MKF99PAP?_encoding=UTF8&psc=1
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That's the exact one I have :)
Not exactly the same but here’s an Amazon link to one https://www.amazon.com/Deluxe-Medium-Wood-Frog-Guiro/dp/B00NP80XMO