Episode 4: The Art of the Bonehead! How to Raise a Screw Tree!

Heybot buys a mysterious screw seed off a mysterious woman. But although he and Nejiru put a lot of love into raising it, it ends up growing into one flat tree! Enlisting the help of the ninja Naganagamaru and his Stretchy-Stretchy screw, they manage to get the screw to grow... and grow... and it won`t stop growing until it reaches the moon! Source: crunchyroll