Rishab always loved the fact that he could create something on his own and lego toys were a big part of his creations for a long time. Long Lego playlist on his video channel- https://www.youtube.com/playlist?list=PLbBOPvmjD9x8H1FcMi2J3l7tTmHjHpI8g is a testament to that fact. This not only introduces electronic parts such as transistors, battery, speaker, motor, buttons switches etc but also teach them to connect them together in a logical order to result in over 125 projects.
Rishab claimed that it was the greatest toy he ever reviewed so far and is already feeling like a scientist.
See Whos talking to me