I worked for someone who had a frog bog.
There was usually a clerk inside.
Sometimes it hit big, sometimes it blanked (but it was run by clerks).
I remember working across from it, once when the line up side locs were doniker, but the center had some draw from the bumper boats. The joint was constantly tipping, despite the clerk not knowing how to work. I made more money leaving my joint to sell frogs to his tip than I did in my joint.
The one time I worked it myself, I won good money, despite the organized cheating from the marks, who would draw my attantion to one side, while they tried throwing the frogs in when they didn't think I was looking. Luckily, it's just as hard to throw them as it is to launch them in
Back then, it was $2 for 3 frogs with $4-6 stock. If you don't have stuffed frogs, they'll steal the games frogs.
Don't know where to buy the launchers.
Every crowd has a silver lining - PT Barnum