KNEX and Angry Birds have teamed up to make one of the most exciting toys around with the hands-on fun of KNEX and the wildly popular Angry Bird characters that kids love. This 4-pack of introductory kits gives you a large variety of Angry Birds to play with and a number of Minion Pigs and other essential accessories too. You can create each set on its own and explore different ways to take out the pigs, or pile them all together and come up with a colossal puzzle that pits bird against pig in an epic battle. Each set includes numerous small pieces and isnt recommended for children under 5 years of age. JPMA Certified.