If you're a nanoblock fan and you want a good challenge then this animal set may just be what you're looking for. These are NOT standard compatible bricks, these are much smaller in size.
There are a total of 3 sets sold separately:
6625 Land animals -Panda, kangaroo and alpaca is 1950 Pieces.
6626 Birds - Eagle, parrot and peacock is 2120 Pieces.
6627 Farm animals - Horse, ram and cow is 2018 Pieces.