You can program this robot to sit, walk, shake, any thing you can think of.

Used in after school Robotics Class and kids loved it (5th to 8th grade).

Parts:

Eight servos like these: https://www.amazon.com/dp/B0CSKJP9CD?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4

One BBC MicroBit

One Kitronik 16 port servo board :  https://kitronik.co.uk/products/5694-compact-16-servo-driver-board-for-the-bbc-micro-bit?_pos=6&_sid=ead25f37d&_ss=r

Some M3 screws to hold the legs to the servo

Some small wood screws to attach servo body to 3D Printed part.

If surface is too smooth dog will move but not go anywhere.

If surface is rough then it will also not go anywhere. 

I put a felt like cloth on the table and clamped that down and it worked well.