Pony getting water - lineart

My sister asked me to draw a couple of linearts with ponies so she has something to colour... I agreed. XD
She doesn't watch the show, but she likes the ponies (she doesn't watch it because it's in english and she doesn't understand what they say).

I didn't want to post it here at first but... why not. XD

Random pony getting water from a waterfall - sis' idea