Nice and useful
nice and useful robot there 
just a little slow but it won’t matter if you are really on a holiday 
i am waiting for some atmegas and i have been planning to make a robot like this for my aquarium so that it will feed the fishes with fish food every 12 hours and turn off the filter for some 20 minutes so that fishes can finish their food in that time.
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I’ve always been a fan of
I’ve always been a fan of Lego. With Lego it’s more easy to build something that suits the demands. Next to that: I’m a bit lazy and Arduino is easy to program. But since I like electronics, I decided to build the electronics myself instead of using the NXT platform. Using an Arduino instead of NXT programming means also more flexibility and it’s a lot cheaper.
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I second that
Lego has overpriced so many sensors. If I wanted a touch sensor (known to the rest of lmr as a switch) I have to pay $27!!! I can get a switch at my local Jaycar for about $2… I have moved to Arduino and never looked back although I do like to use Lego in my robots too, it’s just so easy to modify and the mechanisms are very smooth as well.
Nice work on the robot by the way, it looks pretty awesome. I like the extreme close ups just before the water starts coming out on the video.
This Lego plant-watering
This Lego plant-watering robot is quite amazing and there are people that are building all kinds of objects from Lego parts. Some of them are so complicated that it takes weeks to finish them. If you check out more information about this LEGO franchise you will find out how dedicated the ones that are working there actually are.