What are some RPi development kits to interest kids in robotics and engineering?

[helpme]

I want to interest my kids to robotics and engineering. What are some development kits to buy for this purpose?

I just found this.
https://www.dexterindustries.com/gopigo3/

Can forummers recommend any others? Price is not an important issue for the moment.

[awarburton]

Have a look at Flotilla from Pimoroni (it's not Pi specific but can be used with the Pi!)