Building set features 1347 bricks and pieces to build a huge environment with 4 sections that connect to open and close a cave and find a hidden Great Ball inside Build a cave in the rainforest, a mountain with a waterfall and an entrance to the Jungle ruins, a lake with a small beach and a forest! Includes Butterfree, Squirtle, Kabuto and Rowlet Bricks pieces combine with all MEGA Pokemon building sets and are compatible with other name brands Ideal for ages 9 and up, this building toy provides build-and-play experiences to help develop creativity and problem-solving skills