This set is a great starter kit and includes 408 micro and classic scale KNEX rods and connectors to build anything you can imagine. The enclosed step-by-step colour-coded instructions get the builder started with 50 different unique builds. Builds vary in difficulty so you can build a patrol boat, dragon, school bus and more; Most models can be built one at a time. Includes step-by-step colour-coded instructions for 50 unique models. 408 KNEX rods and connectors. Create your very own innovative models or follow the instructions for great ideas; Set is a mix of micro and classic scale knex pieces. Most models can be built one at a time; some model instructions are available online only. Size H35.56, W43.18, . For ages 7 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult.