Great Recommendation, Anon~pi!

I just read the manga rather than watch the anime but I will try watching the anime next.
My thoughts in spoilers It's a sweeter story then I was expecting. I absolutely thought the happy space alien would simply fail over and over again and it would be some grim dark comedy. However as I read it seems the story did have a positive message to say after all. And it's a really good one. The three children's lives were never going to be solved with happy gadgets and nick-nacks but rather the most powerful gadget of all which is talking~pi! Talking allows two individuals to connect with each other and start to empathize. Which was never going to happen with the way the two girls interacted with each other.
It wasn't the space alien so much that solved their issue but it was both girls realizing that they needed someone (not a dog) to support them and surprisingly it was their enemy the whole time~pi!