Filters
Brain Builders - unknown

Assembly / Wood

Designer: unknown
Maker: MindWare

Marble Circuit - Sjaak Griffioen

Maze / Plastic

Designer: Sjaak Griffioen
Maker: MindWare

Plexle - Water - Dan Gilbert

Assembly / Wood

Designer: Dan Gilbert
Maker: MindWare

3-D Scramblers Squzzle Square Puzzle - unknown

Pattern / Paperboard

Designer: unknown
Maker: MindWare