Complex sentence: Units were beige molded plastic with 2 drive wheels as feet "and stood about 36" tall, arms on Topo 1 and 2 would fold out, but Topo 3 lacked arms all together.
Split into simpler sentences: Units were beige molded plastic with two drive wheels as feet "and stood about 36" tall. Arms on Topo 1 and 2 would fold out, but Topo 3 lacked arms all together.