 If you liked
FLCL
|
 ...then you might like
Aachi wa Ssipak
|
They are both crazy and spontaneous. However, Aachi & Ssipak is for adults only, so I do not advice watching it if you still go to kindergarten. If you're eager to get acquainted with modern experimental animation and can't wait till you grow up, FLCL was made just for you (then your brains will later survive through A&S.. perhaps...)