For their latest adventure Phineas, Ferb build a shrinking machine to shrink them and their friends down to play a game of hide and seek. Meanwhile Doofensmirtz sends thousands of small robots to spy on Perry. Unfortunately they go rogue steal Phineas and Ferb's machine and, cause mayhem throughout the house. Phineas and the gang must traverse the Flynn house to find the machine. Take control of Phineas, Ferb, Isabella, Buford, Baljeet, and their newest friend Irving. Use the household environment in ways never done before. And a friend can join the fight with drop-in, drop-out co-op. When your small you can do it all.