Filters
IQ Test - Light Green - unknown
Doppelstäbe - unknown

Burr / Wood

Designer: unknown
Maker: Fridolin

Atom - unknown

Assembly / Wood

Designer: unknown
Maker: Fridolin

Extra piece "Green" - Small Square 2 - unknown
Extra piece "Green" - Square - unknown
Extra piece "Red" - Triangle - unknown
Extra piece "Purple" - Large Square - unknown
Extra piece "Blue" - Small Square 1 - unknown
Extra piece "Blue" - Small Square 3 - unknown