Before improving the battery life of this toy I wanted to see what the current draw was of the not so smart version. Under battery power I measured 35mA with the batteries at around 2.47V.

To get a current curve at different voltages it was easier to open up the toy so that I could clip on test
leads. The plastic housing is glued together at the seam. A small vise made quick work of opening this up.

I measured the following current draw at voltages from 2V to 3V.