they sell small glass bowls at the dollar store. at mine, they come in 3 packs or 4 packs. the 4 packs are a little smaller. cant beat 4 for a dollar. I would get small crickets for them, and they wont jump once they are in the bowl. The only way mine get out, is if there is a bunch of calcium powder in the bowl and it gets wet. Then once the powder dries all over the sides its sticky enough for them to climb out. Since you will have 3 or 4 bowls, just keep a clean one around to exchange once it gets dirty...

And he is right, red eyes will pretty much eat until they are full. Im still wondering how you got baby crickets in your substrate. You should be using small crickets and i dont think they lay eggs. I always thought only adults lay eggs and adults are too big for your frogs. I would still change your substrate though. You dont want a bunch of crickets running around in your tank stinking it up. Also, crickets CAN bite your animals. It will cause infection in some cases. Its best not to leave a ton of extra crickets running around... So go the bowl method

With the bowl, it might take them some time to get used to it. I suggest keeping a few outside of the bowl and also some inside. Also, put a piece of driftwood or something next to the bowl so the frogs can sit ontop of it and look down into the bowl. Some people say their frogs cant figure out how to get inside the bowl. With driftwood next to my bowl, i would catch them in there every night chowing down on crickets with calcium powder all over their noses :P