
For designing & making things ranging from toys to scientific equipment 4 interchangeable parts provide an infinite number of permutations A unique professional construction system for designing & making things ranging from toys to scientific equipment. The system comprises just 4 types of interchangeable part that slot or fasten together in an infinite number of different permutations. The system is used by professional designers to create prototypes & by pupils & students to get ideas out of their heads & into working models such as vehicles robots automata equipment cases etc. The system can be extended using many other materials such as inexpensive 2mm thick MDF sheet.