Detailed assembly instructions for 6 models plus 9 suggestions. Only one of the models can be built at a time. Tools included. Erector Set Multi-Model Set Parts Comparison Matrix Multi-Model Set Pulley Wheels Gears Motor Case Power Tool 2 Model Set x � � � � � 5 Model Set x x � � � � 7 Model Set � x � � � � 10 Model Set x x x � � � 15 Model Set x � � � � � 20 Model Set x x x 3V � � 30 Model Set x x x 6V � � 40 Model Set x x x 6V x � Best of 50 Model Set x x x 6V � x
