Ha ha I use tongs but to drop them in front of frog (it helps if you put crix in fridge for 20 mins to slow em down) but they mostly get ate before hitting floor or just after !
for some frogs you can do whatever you want, try as many ways as you can, they would never eat from tongs, stubborn little dudes
Save one animal and it doesn't change the world, but it surely changes the world for that one animal!