We have covered plenty of educational robots here in the past. The EZ-Robot Six Hexapod Educational Robot Kit is another one for researchers and those learning about robotics. It has 6 legs and 13 EZ-bit connections for further add-ons. Its parts clip together easily. The robot has a camera and offers vision tracking. It also has speech recognition to respond to your commands.
You can control this robot from your smartphone via WiFi. The companion app is iOS/Android compatible. The EZ-Builder software lets you customize robot movements easily.