Yesterday my Hap-Pi robot DIY kit arrived in the post - today I built it.
It came in two parts - the chassis and the Hap-Pi add-on board which sits on top of a Raspberry Pi. First I had to solder the board - The Little Robot Company provided a very good help sheet and associated video for this.
Once up and running (after realising I needed to flick the switch on the battery case!) on the Pi I used ScratchGPIO to interface with the Hap-Pi. Simon Walters has produced a simple guide here for this. This all worked.
There’s a Hap-Pi website on it’s way which will provide more information and tutorials - pi-school.com