Maybe some frogs/anoles in a "Living terrarium" im sure they have a mesh lid or something you could use (they must make one for when its used to fish) and just throw some clips on it since frogs/small lizards cant really push it open. put some mulch and moss and maybe a small pond part with some small fish?
something like this
the dimensions are 36.4" x 16.4" x 21.9", to small for a beardie.