Micro - Frogs

I dug a hole in our raised bed in the garden. I put a watertight planter in it. I put a brick at the bottom to one side and a water-based plant on top of the brick. I put some pebbles at the bottom and a bit of scrap stone or something that creatures could climb up and then left it. We had a frog quite quickly, the child named him Dave. Then another, and I believe we are likely on the third…